Question

If displacement of a particle is directly proportional to the square of time. Then particle is moving with. A. Uniform acceleration B. Variable acceleration
C. Variable acceleration but uniform velocity D. Uniform velocity

Answer 1

A. Uniform acceleration

Reason: Let s = k t^2 (k constant). Then v = ds/dt = 2k t (varies with t) and a = dv/dt = 2k (constant), so acceleration is uniform.