Question

An object of mass $2kg$ is sliding with a constant velocity of $4m{s}^{-1}$ on a frictionless horizontal table. The force required to keep the object moving with the same velocity is:

• A. 32 N
• B. 0 N
• C. 2 N
• D. 8 N

Answer 1

The correct option is B 0 N

Ideally, a frictionless horizontal table has no resistance to motion.
Therefore, the object will continue to slide at $4m{s}^{-1}$ without any application of force.
$\therefore$ The force required to keep the object moving = $0$