Question

What is the magnitude of the friction force acting 100 N wagon if the wagon accelerates at pulling on its handle with 80.0 N of force at an angle of 60.0 degrees from horizontal?

(A) 20.0 N

(B) 35.0 N

(C) 40.0 N

(D) 50.0 N

Answer 1

Force of friction can be balanced by the horizontal component of 80N force.

Let f be the force of friction.

then,

$f = 80cos60^\circ$

$f = 40 N$

Hence, option C is correct.