Question

A hockey puck of mass 2000 g is sliding south along the ice and slows at a rate of 0.9 m/s2. What is the net force acting on the puck?

Answer 1

1.8 N to the north

Step-by-step explanation:

By the second Law of Newton, the net force is equal to

F = ma

Where m is the mass and a is the acceleration. Replacing m = 2000g = 2kg and a = 0.9 m/s², we get that the net force is

F = (2 kg)(0.9 m/s²)

F = 1.8 N

So, the net force acting on the puck is 1.8N to the north because the puck is decelerating.