Question

A block is rotating in a circular track and angular speed of the block is given by w = at². Where w is in rad/s and t is in seconds, a is a constant and equal to 2 rad/s³. Mass of the block is 1 kg and radius of circular track is 1m. Net force acting on the block at t = 2s is –

• A. 8 N
• B. 8$\sqrt{65}$N
• C. 32 N
• D. None of these

Answer 1

Answer: (B)

8$\sqrt{65}$N

Answer 2

F = m$\sqrt{a_{t}^{2} + a_{r}^{2}}$