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## Homework Statement

3 carts are connected by strings. The first cart is 5kg, the second 2kg, and the third 8kg. A string is fixed at the front of the first cart is pulled with a force of 30 N. In the following problems be sure to illustrate your answers with the corresponding free body diagrams.

a. What is the acceleration of the train of carts?

b. What is the tension in the string connecting the first and second car?

c. What is the tension in the string connecting the second and third car?

## Homework Equations

Fnet = ma

I don't remember the equations to find tension

## The Attempt at a Solution

I figured out the acceleration easily:

Fnet = (m1 + m2 + m3)a

30 N = (15kg)a

a = 2 m/s ^2

The problem i'm having is I forget how to find the tension force in the strings.

Any help?