Motion Test - 5...

A car was moving at $$1 m{s}^{-1}$$ when brakes were applied. The brakes offered a retardation of $$0.5 m{s}^{-2}$$. If the brakes are applied for $$2 s$$, after $$2 s$$

Which of the following is not an unit of displacement?

A car travelling at $$2 m{s}^{-1}$$ undergoes an acceleration of $$1 m{s}^{-2}$$. How long will it take to double its velocity?

Can, a body in motion, have zero displacement?

Find the acceleration of the vehicle.

A car moving at $$2.5 m{s}^{-1}$$ doubles its velocity with an acceleration of $$0.5 m{s}^{-2}$$ in some time. If the same car travels at $$1.5 m{s}^{-1}$$, what will be its final velocity if same acceleration acts on it for same time?

Distance is

Length of the straight line joining the initial to the final positions of a moving body is known as its

A body with an initial velocity of $$18\ kmph$$ accelerates uniformly at $$9\ cm{s}^{-2}$$ over a distance of $$200\ m$$. Find its final velocity in $$m{s}^{-1}$$.

When brakes are applied to a bus, the retardation produced is  $$25 cm{s}^{-2}$$ and the bus takes $$20s$$ to stop. Calculate the initial velocity of the bus.