A uniformly moving cricket ball is turned back by hitting it with a bat for a very short time interval. Show the variation of its acceleration with time. (Take acceleration in the bakward direction as positive).

The velocity time graph shows the motion of a cyclist Find its acceleration.

Show that the slope of velocity-time graph for uniformly acceleratied motion is equal to the acceleration of the body.

A pendulum is clamped on the ceiling of a stationary car and its time period is T.If the car starts to move with some acceleration,then its time period will be :

A car travelling with a speed of 2ms^-1 increases its speed to 10ms^-1 in a time interval of 4s. What is the acceleration of car?

Show that the distance covered by a particle having uniform acceleration in time interval (t'-t) is the area under v - t graph for time t' and t.

In the figure gives a speed-time graph of a particle in motion along a constant direction. Three equal intervals of time are shwon. In which interval is the average acceleration greatest in magnitude ? In which interval is the average speed greatest ? Choosing the positive direction as the constant direction of motion, give the signs of v and a in the three intervals. What are the acceleration at the points A,B,C and D?

A cricket ball of mass 150 g moving with a speed of 126 km/h hits at the iddle of the bat, held firmly at its position by the batsman. The ball moves straight back to the bowler after hitting the bat. Assurming that collision between ball and bat is completely elastic and the two remain in contact for 0.001 s, the force that the batsman had to apply to hold the bat firmly at its place would be

Direction. In the follwing questions, a statement of assertion is followed by a statement of reason. While answering a question, you are required to choose the correct are out of the given four responses and mark it as (A). If both assertion and reason are true and reason is the correct explanation of the assertion, (B) if both assertion and reason are true but reason is not correct explanation of the assertion. (C) if asssertion is true, but reason if false, (D) if both assertion and reason are false Assertion : the drift velocity of electrons in a conductor is very small, when its two ends are connected to a battery. Reason : It is because, as the electrons accelerated , they get scattered or defleted on suffering collisions against the positive ions in the conductor