Question

An object is moving on a plane surface uniform velocity 10m/s

Answer 1

Frictional force = 10 N

Object moves with uniform velocity only when net Force is zero.

Hence external force and frictional force should be equal in magnitude to make net force to be zero.

Answer 2

Explanation:

An object is moving on a plane surface uniform velocity 10m/s in presence of a force 10N. ... When an object is moving with uniform velocity,then force acting on the object is zero. So net force on the object is zero therefore frictional force is the 10 N.