Motion Test - 4...

A truck increases its speed from $$10km/h$$ to $$50 km/h$$ in $$20$$ seconds. Its acceleration is:

A stone is thrown vertically upward with an initial velocity of $$40\, ms^{- 1}$$. Taking $$g\, =\, 10\, ms^{- 2}$$, the maximum displacement and distance covered by the stone on reaching the ground is 

A moving bus is brought to rest within 30 seconds by applying brakes. What is its initial velocity, if the retardation due to brakes is 2 $$ms^{-2}$$?

A car is moving with a uniform velocity of 40 km h$$^{-1}$$ in straight line. Its acceleration after 1 hour is:

A ball starts rolling on a horizontal surface with an initial velocity of $$1 \ m/s.$$ Due to friction, its velocity decreases at the rate of $${0.1 m/s^2}$$. How much time will it take for the ball to stop?

A vehicle moving at a speed of 15 m/s is stopped by applying brakes which produce a uniform acceleration of -0.5 $$m/s^2$$. The distance covered by the vehicle before it stops is:

A boy running at an average speed of $$4 km/ hr$$ reaches school from his home in $$\dfrac{1}{2}\ hr$$. The distance of the school from his home is

When a bus driver travelling at a speed of 20m/s applied brakes and brings the bus to rest in 10 seconds, then retardation will be

$$A$$ and $$B$$ are arguing about uniform acceleration. $$A$$ states that acceleration means "the longer you go." $$B$$ states that acceleration means "the further you go." Who is right?

A body has an acceleration of $$\displaystyle -4\ { ms }^{ -2 }$$. Then its retardation is equal to: