Motion Test - 3...

A driver applies brakes when he sees a child on the railway track, the speed of the train reduces from $$54\ kmph$$ to $$18\ kmph$$ in $$5\ s$$. What is the distance traveled by train during this interval of time?

The speed of a car reduces from $$15  m  s^{-1} $$ to  $$5  m  s^{-1}$$ over a displacement of 10 m. What is the uniform acceleration of the car?

A body having zero speed :

A body thrown vertically up reaches a maximum height of 50 m. Another body with double the mass is thrown up with double the initial velocity will reach a maximum height of :

A stone is thrown vertically up from the ground. It reaches a maximum height of 50 m in 10 s. After what time will it reach the ground from the maximum height?

Two balls are dropped from heights $$h_1$$ and $$h_2$$ respectively. The ratio of their velocities on reaching the ground is __________ .

A stone thrown vertically upwards with an initial velocity u from the top of a tower reaches the ground with a velocity of 3 u. The height of the tower is :

A ball is released from the top of height 'h' meters. It takes 't' seconds to reach the ground. Where is the ball at the time $$\displaystyle \dfrac{t}{2} s$$ ?

A car attains a velocity of 10 m s$$^{-1}$$ in 5 s. If initially, it had been at rest, its acceleration must be ___________ .

A car is moving in a straight line. The position time graph $$(x-t)$$ is as shown in the given figure. Find the average speed of the car for the section- CD.