# Accleration and angle

1. Oct 14, 2004

### jenc305

Please help me with this question. I understand how to calculate the velocity from the given conditions but I don't know how to figure out the acceleration or the angle. Thanks!

A cart is released from rest at the top of a perfectly frictionless air track. After an elapsed time delta t = 2.0s, the cart has traveled delta x = 32.0 cm down the track. What is the cart's acceleration? What is the angle of theta of this track?

2. Oct 14, 2004

### Tide

The acceleration of the cart is the component of its weight parallel to the track divided by its mass so $a = g \cos \theta$. The distance it travels is

$$d = \frac {1}{2} a t^2$$

and you have enough information to find the acceleration and the angle.

3. Oct 15, 2004

### jenc305

I've figured out the problem with your help. Thank you!!