I have this problem:

A 10 kg box is resting on a frictionless table and someone drags it by a string at a 30 degree angle to the horizontal with a force of 40 Newtons. Find the acceleration of the box. Draw a free body diagram of the system.

What is a free body diagram?

## Best Answer

To draw a free body diagram, start with a picture of the system. Draw arrows to represent all the forces exerted on parts of the system, with the tail of the arrow attached to the object that force acts on. Label the forces. Then erase everything but the arrows.

To solve the problem, you will need to determine what force accelerates the box. This should be the horizontal component of the tension in the string. To get this component, use the formula $F_x=F cos\theta$. Then apply Newton's Second Law.