Hey! 100 points. Can someone give me a couple of challenging problems on kinematics? :)
Divyankasc:
I asked for challenging problems ;-;
So,you report these answers.......
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From the top of a tall building, a gun is fired. The bullet leaves the gun at a speed of 340m/s, parallel to the ground. The bullet puts a hole in a window of another building at "x" distance away, and hits a wall that faces the window that is "6.9m" away. The vertical distance in which the bullet traveled after it hits the window to the wall is "0.5m". The vertical distance between the gun on top of the roof and where the bullet strikes the wall is labeled as "y". In this problem, find x and y
swimmer can swim at 2 m/s. He sets out to swim across a 150 m wide river which is flowing East at 3 m/s. He swims in a northerly direction. find the direction he will travel and velocity in that direction.
Billy now wants to throw a ball at 55 degrees above the horizontal axis to Samantha, who is hanging from her apartment winder 25.0 m above the ground. Her apartment is 45.0 m away from Billy. What initial speed must Billy throw the ball so Samantha can catch it?
soccer player kicks a ball so that the ball leaves the ground at an angle of 35 degrees above the horizontal and lands on the ground 25 meters away. Determine the speed at which the ball left the ground.
A body is thrown vertically up from the ground with a speed  and it reaches maximum height h at time . What is the height to which it would have risen at 
Two locomotives approach each other on the parallel tracks. Each has speed of 95 km/h with respect to the ground. If they are initially 8.5 km apart, how long will it be before they reach each other?
An object has an initial speed of 8.0 m/s and is stopped in intervals of 0.20 s. What is the magnitude and direction of his acceleration.
Two boys are racing for chocolates. The older one has a speed of 1 m/s and the younger one has a 0.5 m/s. The older one told the younger one to run first, which the younger one does. Ten seconds later the older one follows. How far would they be from the starting line for the older one to overtake the younger one?
A car was traveling at 12m/s when the driver stepped on the brakes. If the car comes to a full stop in 5.0 s, what was its acceleration? What distance did it cover?
Brakes applied to a car produce a uniform retardation of . If the car was travelling with a velocity of 27 m/s, what distance will it cover before coming to rest?
A swimmer can swim at 2 m/s. He sets out to swim across a 150 m wide river which is flowing East at 3 m/s. He swims in a northerly direction. find the direction he will travel and velocity in that direction.
A particle has velocity  and its acceleration is  at that moment of time. Find the rate of change of particle’s speed.
toy rocket is launched with an initial velocity of 12.0 m/s in the horizontal direction from the roof of a 37.0 m -tall building. The rocket's engine produces a horizontal acceleration of  (time dependent acceleration), in the same direction as the initial velocity, but in the vertical direction the acceleration is , downward. Air resistance can be neglected. How long is the rocket in the air before it hits the ground?
Solution
Problem 92.
A car is moving with a velocity of 72 km/h. It's velocity is reduced to 36 km/h after covering a distance of 200 m. Calculate its acceleration.
Solution
Problem 93.
A car initially at rest, starts moving with a constant acceleration of  and travels a distance of 25 m. Calculate its final velocity.
Solution
Problem 94.
An object thrown upwards with a velocity u from the top of a tower of height H reaches the ground in  seconds. When thrown downwards with the same speed it reaches the ground in  seconds. When dropped from the top of tower it reaches in  seconds. Show that .
Solution
Problem 95.
An airplane is flying due north with a speed relative to the ground of 300 km/h. It then encounters a cross wind that is directed due east. If the resultant speed of the airplane is 310 km/h, how fast is the cross wind?
Problem 96.
A particle moves along the curve  with constant speed . Express its velocity as a function of (x,y).
An astronaut jumps from an airplane. After he had fallen 40 m, then his parachute opens. Now he falls with a retardation of  and reaches the earth with a velocity of 3.0 m/s. What was the height of the aeroplane?
A ball is thrown vertically upward at 20 m/s ignoring air resistance and taking . Calculate:
(1) maximum height.
(2) time taken to reach the maximum height.
(3) time taken to return to starting point.
Albert is riding his scooter at a velocity of 80 km/h when he sees an old woman crossing the road 45 m away he immediately steps hard on the break to get the maximum deceleration of . How far will he go before stopping, will he hit the old woman?
A scout travels 5 km south, 3 km east, and 2 north. Find the components of each displacement and find the final displacement.
swimmer can swim at 2 m/s. He sets out to swim across a 150 m wide river which is flowing East at 3 m/s. He swims in a northerly direction. find the direction he will travel and velocity in that direction.
Billy now wants to throw a ball at 55 degrees above the horizontal axis to Samantha, who is hanging from her apartment winder 25.0 m above the ground. Her apartment is 45.0 m away from Billy. What initial speed must Billy throw the ball so Samantha can catch it?
soccer player kicks a ball so that the ball leaves the ground at an angle of 35 degrees above the horizontal and lands on the ground 25 meters away. Determine the speed at which the ball left the ground.
A body is thrown vertically up from the ground with a speed  and it reaches maximum height h at time . What is the height to which it would have risen at 
Two locomotives approach each other on the parallel tracks. Each has speed of 95 km/h with respect to the ground. If they are initially 8.5 km apart, how long will it be before they reach each other?
An object has an initial speed of 8.0 m/s and is stopped in intervals of 0.20 s. What is the magnitude and direction of his acceleration.
Two boys are racing for chocolates. The older one has a speed of 1 m/s and the younger one has a 0.5 m/s. The older one told the younger one to run first, which the younger one does. Ten seconds later the older one follows. How far would they be from the starting line for the older one to overtake the younger one?
A car was traveling at 12m/s when the driver stepped on the brakes. If the car comes to a full stop in 5.0 s, what was its acceleration? What distance did it cover?
Brakes applied to a car produce a uniform retardation of . If the car was travelling with a velocity of 27 m/s, what distance will it cover before coming to rest?
A swimmer can swim at 2 m/s. He sets out to swim across a 150 m wide river which is flowing East at 3 m/s. He swims in a northerly direction. find the direction he will travel and velocity in that direction.
A particle has velocity  and its acceleration is  at that moment of time. Find the rate of change of particle’s speed.
toy rocket is launched with an initial velocity of 12.0 m/s in the horizontal direction from the roof of a 37.0 m -tall building. The rocket's engine produces a horizontal acceleration of  (time dependent acceleration), in the same direction as the initial velocity, but in the vertical direction the acceleration is , downward. Air resistance can be neglected. How long is the rocket in the air before it hits the ground?
Solution
Problem 92.
A car is moving with a velocity of 72 km/h. It's velocity is reduced to 36 km/h after covering a distance of 200 m. Calculate its acceleration.
Solution
Problem 93.
A car initially at rest, starts moving with a constant acceleration of  and travels a distance of 25 m. Calculate its final velocity.
Solution
Problem 94.
An object thrown upwards with a velocity u from the top of a tower of height H reaches the ground in  seconds. When thrown downwards with the same speed it reaches the ground in  seconds. When dropped from the top of tower it reaches in  seconds. Show that .
Solution
Problem 95.
An airplane is flying due north with a speed relative to the ground of 300 km/h. It then encounters a cross wind that is directed due east. If the resultant speed of the airplane is 310 km/h, how fast is the cross wind?
Problem 96.
A particle moves along the curve  with constant speed . Express its velocity as a function of (x,y).
An astronaut jumps from an airplane. After he had fallen 40 m, then his parachute opens. Now he falls with a retardation of  and reaches the earth with a velocity of 3.0 m/s. What was the height of the aeroplane?
A ball is thrown vertically upward at 20 m/s ignoring air resistance and taking . Calculate:
(1) maximum height.
(2) time taken to reach the maximum height.
(3) time taken to return to starting point.
Albert is riding his scooter at a velocity of 80 km/h when he sees an old woman crossing the road 45 m away he immediately steps hard on the break to get the maximum deceleration of . How far will he go before stopping, will he hit the old woman?
A scout travels 5 km south, 3 km east, and 2 north. Find the components of each displacement and find the final displacement.
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Q-1 An astronauts jumps from an airplane .After he had fallen 40m,then his parachute opens ,Now he falls with a retardation of 200m/s² and reaches the earth with a velocity of 3.0m/s.What was the height of the aeroplane.?
Q-2 A train covers 60 miles between 2p.m and 4p.m .How fast was it going at 3.p.m??
Q-3 The slowest animals ever discovered is a crab found in the Red sea that travels an average speed of 5.7 km/year .How long will it take this crab to travel 1 m.?
Q-4A plane flies 955 km due east , then turns due north and flies another 469km .Draw an x-y axis at the starting point with the positive x axis pointing east, and determine the coordinates of the planes,find its position.
Q-5 Is it possible that the car could have accelerated to 50mph within 268m ,if the car can only accelerate from 0 to 60 mph in 15 second.
Q-6. A car is accelerated at 12m/s^2 .Find it's acceleation in km/h^2.
Q -7 A car travels up a hill at a constant speed of 37 km/h and returns down the hill at a constant speed of 66km/h . Calculate the average speed in whole trip.
Q-8 We drive a distance of 1 km at 16km/h ,Then we drive an additional distance of drive an additional distance of 1 km at 32 km/h . What is our average speed.
Q-9 An airline reaches it's take off speed of 163 mph in 36.28 .What is the magnitude of its average speed.?
Q-10A ball us thrown upwards with initial velocity .What is the hrs in speed on the way down ? Disregard air resistance...
Q-11. From the dimensions analysis ,find the time it takes for a ball to fall from a height.
Q-12 How high can a human throw a ball if he can throw it with initial velocity 90 mph.
Q-13What is 3.3 sug in kg.?
Q-14 It takes you 4.5 m to walk with an average velocity of 1.2 m/s to the North from the bus stop to measum .What is our displacement..
Q-15 The car drives straight off the edge of a cliff that is 57 m high .The investigator at the scene of the accident that the point of investigator is 130 m from base of the cliff .How fast was the car travelling when it went over the cliff..
Q -16 An object is fixedup at a speed of 9.8 m/s .Compute it's has altitude and the time it takes to reach that height .Ignore air resistance.
Q-17 A motor scooter travels east at a speed of 13 m/s .The driver then reverse direction and heads west at 17m/s . What was the change in velocity of the scooter?
Q-18A truck goes down a certain road at as average speed of 40km/hrs and returns alone the same road at an average speed of 60km/hrs . Calculate the average speed for the round trip.
Q-19 A tennis ball is thrown vertically upwards with an initial velocity of +8.0m/s.
a)What will the ball speed be when. it returns to it return to its starting point.
Q -20 If it takes a player 3 second to run from the batter's box to the first base at an average velocity of 6.5 m/s. What is the distance she cares in that time?
♥♥♥♥ One extra question♥♥♥
Q-21. A cycle travels 3.2 km due east in 0.1 hour the 3.2 km at 15.00 east of North in 0.21 hour ,and finally another 3.2 km due east in 0.1 hrs to reach it's destination .The time lost in turning in negligible .What is the average velocity for the entire trip.......
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%%%%%Follow me .......
Here Tanu.......
Click thankyou .......guys...
Q-1 An astronauts jumps from an airplane .After he had fallen 40m,then his parachute opens ,Now he falls with a retardation of 200m/s² and reaches the earth with a velocity of 3.0m/s.What was the height of the aeroplane.?
Q-2 A train covers 60 miles between 2p.m and 4p.m .How fast was it going at 3.p.m??
Q-3 The slowest animals ever discovered is a crab found in the Red sea that travels an average speed of 5.7 km/year .How long will it take this crab to travel 1 m.?
Q-4A plane flies 955 km due east , then turns due north and flies another 469km .Draw an x-y axis at the starting point with the positive x axis pointing east, and determine the coordinates of the planes,find its position.
Q-5 Is it possible that the car could have accelerated to 50mph within 268m ,if the car can only accelerate from 0 to 60 mph in 15 second.
Q-6. A car is accelerated at 12m/s^2 .Find it's acceleation in km/h^2.
Q -7 A car travels up a hill at a constant speed of 37 km/h and returns down the hill at a constant speed of 66km/h . Calculate the average speed in whole trip.
Q-8 We drive a distance of 1 km at 16km/h ,Then we drive an additional distance of drive an additional distance of 1 km at 32 km/h . What is our average speed.
Q-9 An airline reaches it's take off speed of 163 mph in 36.28 .What is the magnitude of its average speed.?
Q-10A ball us thrown upwards with initial velocity .What is the hrs in speed on the way down ? Disregard air resistance...
Q-11. From the dimensions analysis ,find the time it takes for a ball to fall from a height.
Q-12 How high can a human throw a ball if he can throw it with initial velocity 90 mph.
Q-13What is 3.3 sug in kg.?
Q-14 It takes you 4.5 m to walk with an average velocity of 1.2 m/s to the North from the bus stop to measum .What is our displacement..
Q-15 The car drives straight off the edge of a cliff that is 57 m high .The investigator at the scene of the accident that the point of investigator is 130 m from base of the cliff .How fast was the car travelling when it went over the cliff..
Q -16 An object is fixedup at a speed of 9.8 m/s .Compute it's has altitude and the time it takes to reach that height .Ignore air resistance.
Q-17 A motor scooter travels east at a speed of 13 m/s .The driver then reverse direction and heads west at 17m/s . What was the change in velocity of the scooter?
Q-18A truck goes down a certain road at as average speed of 40km/hrs and returns alone the same road at an average speed of 60km/hrs . Calculate the average speed for the round trip.
Q-19 A tennis ball is thrown vertically upwards with an initial velocity of +8.0m/s.
a)What will the ball speed be when. it returns to it return to its starting point.
Q -20 If it takes a player 3 second to run from the batter's box to the first base at an average velocity of 6.5 m/s. What is the distance she cares in that time?
♥♥♥♥ One extra question♥♥♥
Q-21. A cycle travels 3.2 km due east in 0.1 hour the 3.2 km at 15.00 east of North in 0.21 hour ,and finally another 3.2 km due east in 0.1 hrs to reach it's destination .The time lost in turning in negligible .What is the average velocity for the entire trip.......
♥♥♥HOpe it is helPful......♥♥♥♥
%%%%%Follow me .......
Here Tanu.......
Click thankyou .......guys...
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