1. A rocket on launch lifts off from rest with an acceleration of 20m/s .Calculate its velocity after 50s
2. A car is travelling along a straight road at 8.0m/s .It accelerates at 1.0m/s 2 for a distance of 18m.How fast is it then travelling?
3. A train travelling at 20m/s accelerates at 0.50m/s for 30s.Calculate the distance travelled by the train in this time.
4.A stone is thrown vertically upwards with an initial velocity of 20m/s .How high will the stone rise above ground level of the cliff?
5. A car starts from rest and accelerates uniformly for 8.0 s. It reaches a final speed of 16 m s–1.
a What is the acceleration of the car?
b What is the average velocity of the car?
c Calculate the distance travelled by the car.
6. A new model BMW can start from rest and travel 400 m in 16 s.
a What is its average acceleration during this time?
b Calculate the final speed of the car.
c How fast is this final speed in km h–1?
7.
A space-rocket is launched and accelerates uniformly from rest to 160 m s–1 in 4.5 s.
a Calculate the acceleration of the rocket.
b How far does the rocket travel in this time?
c What is the final speed of the rocket in km h–1?
A diver plunges head first into a diving pool while travelling at 28.2 m s–1. Upon entering the water, the diver stops within a distance of 4.00 m from the diving board. Consider the diver to be a single point located at her centre of mass and assume her acceleration through the water to be uniform.
a Calculate the average acceleration of the diver as she travels through the water.
b How long does the diver take to come to a stop?
c What is the speed of the diver after she has dived for 2.00 m.
9.
A cyclist, whilst overtaking another bike, increases his speed uniformly from 4.2 m s–1 to 6.3 m s–1 over a time interval of 5.3 s.
a Calculate the acceleration of the cyclist during this time.
b How far does the cyclist travel whilst overtaking?
c What is the average speed of the cyclist during this time?
10.
A billiard ball rolls from rest down a smooth ramp that is 8.0 m long. The acceleration of the ball is constant at 2.0 m s–2.
a What is the speed of the ball when it is halfway down the ramp?
b What is the final speed of the ball?
c How long does the ball take to roll the first 4.0 m?
d How long does the ball take to travel the final 4.0 m?
11.
A cyclist is travelling at a constant speed of 12 m s–1 when he passes a stationary bus. The bus starts moving just as the cyclist passes, and accelerates at 1.5 m s–2.
a When does the bus reach the same speed as the cyclist?
b How long does the bus take to catch the cyclist?
c What distance has the cyclist travelled before the bus catches up?
Answers
Answer:
1. A rocket on launch lifts off from rest with an acceleration of 20m/s .Calculate its velocity after 50s
2. A car is travelling along a straight road at 8.0m/s .It accelerates at 1.0m/s 2 for a distance of 18m.How fast is it then travelling?
3. A train travelling at 20m/s accelerates at 0.50m/s for 30s.Calculate the distance travelled by the train in this time.
4.A stone is thrown vertically upwards with an initial velocity of 20m/s .How high will the stone rise above ground level of the cliff?
5. A car starts from rest and accelerates uniformly for 8.0 s. It reaches a final speed of 16 m s–1.
a What is the acceleration of the car?
b What is the average velocity of the car?
c Calculate the distance travelled by the car.
6. A new model BMW can start from rest and travel 400 m in 16 s.
a What is its average acceleration during this time?
b Calculate the final speed of the car.
c How fast is this final speed in km h–1?
7.
A space-rocket is launched and accelerates uniformly from rest to 160 m s–1 in 4.5 s.
a Calculate the acceleration of the rocket.
b How far does the rocket travel in this time?
c What is the final speed of the rocket in km h–1?
A diver plunges head first into a diving pool while travelling at 28.2 m s–1. Upon entering the water, the diver stops within a distance of 4.00 m from the diving board. Consider the diver to be a single point located at her centre of mass and assume her acceleration through the water to be uniform.
a Calculate the average acceleration of the diver as she travels through the water.
b How long does the diver take to come to a stop?
c What is the speed of the diver after she has dived for 2.00 m.
9.
A cyclist, whilst overtaking another bike, increases his speed uniformly from 4.2 m s–1 to 6.3 m s–1 over a time interval of 5.3 s.
a Calculate the acceleration of the cyclist during this time.
b How far does the cyclist travel whilst overtaking?
c What is the average speed of the cyclist during this time?
10.
A billiard ball rolls from rest down a smooth ramp that is 8.0 m long. The acceleration of the ball is constant at 2.0 m s–2.
a What is the speed of the ball when it is halfway down the ramp?
b What is the final speed of the ball?
c How long does the ball take to roll the first 4.0 m?
d How long does the ball take to travel the final 4.0 m?
11.
A cyclist is travelling at a constant speed of 12 m s–1 when he passes a stationary bus. The bus starts moving just as the cyclist passes, and accelerates at 1.5 m s–2.
a When does the bus reach the same speed as the cyclist?
b How long does the bus take to catch the cyclist?
c What distance has the cyclist travelled before the bus catches up?
Answer:
too many questions please ask one by one