Solution:
An object of mass is sliding with a constant velocity of on a frictionless horizontal table. The force required to keep it moving with the same speed is .Friction is a type of contact force which resists the motion of an object over a surface. Given the mass is and the velocity is , since there isn’t any frictional force acting on it, the object will move at constant velocity without any external force required. Therefore the external force acting on the given system is zero.
