Question

A 40 N force applied at an angle of 37 degrees above the horizontal pulls a 5-kg box on a horizontal floor. The acceleration of the box is 3m/s^2. How large a fritional force must be retarding the motion of the box?

Answer 1

1. From the acceleration, work out the net horizontal force.
2. What is the value of the horizontal component of your 40-newton force ?
3. Work out the frictional force

Answer 2

DO you mean 40 - 3x 15

Answer 3

No, I don't. Use the 3 questions I provided in the right order.
You can answer question 1, then draw a diagram and answer question 2.
Will be here to help a few minutes more.

Answer 4

u mean 40cos 37 - 3x5

Answer 5

Yep ! ^_^

Answer 6

tanks