Question

A body of mass 2 kg moves in a horizontal circular path of radius 5m. In an instant its speed is $2\sqrt5$ m/s and is increasing at the rate of 3 m/s2.The magnitude of the force acting on the body at the instant is,

• A. 6N
• B. 8N
• C. 14N
• D. 10N

Answer 1

Answer: (D)

10N

Answer 2

The magnitude of the force acting on the body at that instant is 10 N due to the combination of the centripetal force required to keep the body moving in a circular path (directed towards the center of the circle) and the tangential force responsible for increasing the speed of the body.

The correct answer is option (D): 10N