Question

A 5 kg block is tied to a 1 m string and is rotated with a constant angular velocity of 2 rad/sec in the horizontal plane.Linear momentum of block is.

• A. 10 kg m/s
• B. 5 kg m/s
• C. 10 N
• D. 5 N

Answer 1

The correct option is A 10 kg m/s

Angular velocity $\omega$ = 2 rad/sec

Radius = length of string = 1 m

Speed v = r $\omega$

v = 2 m/s

Momentum = mass $\times$ speed

= 5 $\times$ 2

= 10 kg m/s