Question

A body of mass 40 gram is moving with a constant velocity of 20 $m{s}^{-}$ ${}^1$ on a horizontal frictionless table. The force acting on the body in horizontal direction is:

• A. 39.200 dyne
• B. 160 dyne
• C. 80 dyne
• D. zero

Answer 1

The correct option is D zero

Force acting on body is in form of normal force

N = mg

= 40 $\times$ 980

= 39200 dynes
While in the horizontal direction, no force is acting on the body.

hence (D) is correct answer