PHQ

A particle moving along the x-axis has acceleration f, at time t, given by f=f0 ( 1 − t T ) 1-tT, where f0 and T are constants. The particle at t=0 has zero velocity. In the time interval between t = 0 and the instant when f = 0, the particle’s velocity (vx) is: 1. f 0 T f0T 2. 1 2 f 0 T 2 12f0T2 3. f 0 T 2 f0T2 4. 1 2 f 0 T 12f0T

PPYQ

The position of a particle with respect to time t along the x-axis is given by 9t2 – t3 where x is in metre and t in second. What will be the position of this particle when it achieves maximum speed along the +x direction? 1. 32 m 2. 54 m 3. 81 m 4. 24 m