A body is initially at rest. It Undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to(i)t(1)/2 (ii)t(iii)t(2)/3(iv)`t^2`

A body is moving unidirectionally under the influence of a source of constant power. Its displacement in time t is proportional to(i)t(1)/2(ii)t(iii)t(3)/2(iv) t^2

One end of a string of length l is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v the net force on the particle (directed towards the centre) is: (i)T,(II) T-(mv^2)//l, (iii) T+(MV^2)/l, (iv)0

A partiale of mass m is moving in a circular path of radius r such that its centripetal acceleration is varying with time t as a_c = k^2rt^2, where k is constant. The power delivered to the particle by the forces acting on it is

A body is released from the top of a tower of height h meters. It takes t seconds to reach the ground. Where is the body at time t/2 seconds?

An electron of mass m anc charge e initially at rest is accelerated by a constant electric field E. Show that the rate of change of de - Broglie wavelength at time t is (-h/(Eet^(2)))

When a body accelerates by erf, what is the velocity after time T, when it starts from rest?

If energy is E, power is P and time is 't', which one is correct-

The height and horizontal distance of a projectile are y= 8t-5t^2 m and x=6t m. its projection velocity is

Displacement is given by x = 1 + 2t + 3t^2 Calculate the value of instantaneous acceleration.

Find the relation v = u + at , where, u-initial velocity, v-final velocity, a-acceleration and t-time.