Question

1. A motorcyclist drives from A to B with a uniform speed of 20 kmh-land returns back with speed of 3)
2. The brakes applied to a car produce an acceleration of 6 ms-2 in the opposite direction to the motion
If the car takes 1 s to stop after the application of brakes, calculate the distance it travels during this
3. Abus decreases its speed from 90 kmh to 72 km h-in 5 s. Find the acceleration of the bus.
A train is travelling at a speed of 108 km h-1. Brakes are applied so as to produce a uniform acceleration
5. A stone is thrown in a vertically upward direction with a velocity of 6 ms-1. If the acceleration of the
solve these questions yourself and then tally the answers by reversing this page)
km his average speed.
time.
(C.B.S.E:)
(C.B.S.E
of -0.5 ms 2. Find how far the train will go before it is brought to rest.
stone and how much time will it take to reach there?
6. A driver of a car travelling at 52 km h- applies the brakes and accelerates uniformly in the opposite
direction. The car stops in 5 s. Plot the speed versus time graph for the car.
7. A ball is gently dropped from a height of 45 m. If its velocity increases uniformly at the rate of
10 m s-, with what velocity will it strike the ground ? After what time will it strike the ground?
8. An object is dropped from rest at a height of 160 m and simultaneously another object is dropped
from rest at a height 100 m. What is the difference in their heights after 2 s if both the objects drop with
same accelerations ? How does the difference in heights vary with time?
9. An electron moving with a velocity of 105 ms enters into a uniform electric field and acquires a
uniform acceleration of 104 ms-2 in the direction of its initial motion
(i) Calculate the time in which the electron would acquire a velocity double of its initial velocity.
(ii) How much distance the electron would cover in this time?
10. A satellite orbits the Earth in 24 hours with a radius of 42000 km. Calculate the speed of the salellite.​

Answer 1

Answer:

hi

Explanation:

itna bada question kasa karoo samajh ma nhi a rha haa

Answer 2

Answer:

ista pe mesg kru h plz KR duu