Question

A 39.5 kg sled is pulled forward
with a 72.8 N force, which causes
an acceleration of 0.521 m/s2.
How much friction force acts
on the sled?
(Unit = N)

Answer 1

Answer:The net force causing the acceleration is

F = ma = 39.5 * 0.521 = 20.58N

So now you can get how much was used to overcome the opposing force of the friction.

Explanation: