A body travels along a straight line with uniform acceleration ` a_(1)` for time `t_(1)` and with uniform acceleration `a_(2)` for time `t_(2)` for time `t_(2)`. What is the average acceleration?

A car starts from rest moves with uniform acceleration a_(1) for t_(1) second and then retards uniformly at a rate a_(2) for t_(2) second. Then t_(1)//t_(2) is equal to

A body starts form rest and moves along a straight line path with uniform acceleration. The atio of velocities at 1= s and t= 2s is __________

A particle move with velocity v_(1) for time t_(1) and v_(2) for time t_(2) along a straight line. The magntidue of its average acceleration is

A particle move with velocity v_(1) for time t_(1) and v_(2) for time t_(2) along a straight line. The magntidue of its average acceleration is

a. If the velocity of a body is zero, does it mean that its acceleration is also zero ? (Yes//No) b. If the acceleration of a body is zero does it mean that its velocity is also zero ? (Yes//No) c. If a body travels with uniform acceleration a_(1) for a time t_(2) thenthe average acceleration is given by a_(av) =(a_(1)t_(1)+a_(2)t_(2))/(t_(1)+t_(2) (Yes//No) d. If a body starts from rest and moves with uniform acceleration the displacemects of the body is 1 s , 2 s, 3 s , etc., are in the ration of (1: 4: 9), etc. (True//False) e. For a body moving whith uniform acceleration, the displacent of the bosy in successive seconds is in the ration of 1: 3: 5: 7 .........................(True//False) .

a. If the velocity of a body is zero, does it mean that its acceleration is also zero ? (Yes//No) b. If the acceleration of a body is zero does it mean that its velocity is also zero ? (Yes//No) c. If a body travels with uniform acceleration a_(1) for a time t_(2) thenthe average acceleration is given by a_(av) =(a_(1)t_(1)+a_(2)t_(2))/(t_(1)+t_(2) (Yes//No) d. If a body starts from rest and moves with uniform acceleration the displacemects of the body is 1 s , 2 s, 3 s , etc., are in the ration of (1: 4: 9), etc. (True//False) e. For a body moving whith uniform acceleration, the displacent of the bosy in successive seconds is in the ration of 1: 3: 5: 7 .........................(True//False) .

A vehicle starts moving in a straight line with an acceleration, a = 4 m//s^(2) , with initial velocity equal to zero. After accelerating for time t_(1) , the vehicle moves uniformly and for time t_(2) , the vehicle finally decelerates for time, t_(1) eventually coming to a stop. The total time taken during the motion is 10s and the average velocity during the motion is 5.1 m/s. The time taken by the vehicle during acceleration is