Question

A box weighing 15 𝑙𝑏 is pulled by a force of 10 𝑙𝑏 along a plane inclined 30o with the horizontal, the force being parallel to the plane. Starting from rest, how far will the box travel after 5 𝑠𝑒𝑐? 

Answer 1

Determine the acceleration of the box:

$$a=\frac{F\cos30°}m=\frac{(10·32)\cos30°}{15}=18.5\text{ lb/s}^2.$$