Question

A particle starts moving and its displacement after t seconds is given in meter by the relation x = 5+41 + 3t² The magnitude of its initial velocity is a) 3 ms-1 b) 4 ms-1 c) 5 ms -1 w d) 22 ms-1​

Answer 1

Answer:

Velocity=derivative of displacement <br> Acceleration=derivative of velocity <br> a. Initial velocity means velocity at

. Now,

, i.e.,

. So initial velocity

. <br> b. Velocity at

:

. <br> c. Acceleration, at any time

. This is a constant acceleration.