An 18 kg cart travels north at 3.0m/s What is the momentum of the cart? A. 54 newton-seconds north B 6.0 newton-seconds south C 54 newton-seconds south D 6.0 newton-seconds north

## Step 1The momentum of an object is calculated by multiplying its mass by its velocity. This is represented by the formula:### where is the momentum, is the mass, and is the velocity.## Step 2In this problem, the mass of the cart ( ) is 18 kg and the velocity ( ) is 3.0 m/s. The direction of the velocity is north.## Step 3Substitute the given values into the formula to calculate the momentum:### ## Step 4The result of the calculation is 54 kg·m/s. The direction of the momentum is the same as the direction of the velocity, which is north.