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 1<br />The momentum of an object is calculated by multiplying its mass by its velocity. This is represented by the formula:<br />### \(p = m \times v\)<br />where \(p\) is the momentum, \(m\) is the mass, and \(v\) is the velocity.<br /><br />## Step 2<br />In this problem, the mass of the cart (\(m\)) is 18 kg and the velocity (\(v\)) is 3.0 m/s. The direction of the velocity is north.<br /><br />## Step 3<br />Substitute the given values into the formula to calculate the momentum:<br />### \(p = 18 \, \text{kg} \times 3.0 \, \text{m/s}\)<br /><br />## Step 4<br />The 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.