Question

a 2 - kg metal ball is rolling at 4 m/s toward a 3 - kg brick that is not moving. identify the momentum of both objects in \\( \frac{\mathrm{kg} \cdot \mathrm{m}}{\mathrm{s}^{2}} \\). (1 point)
ball: 4; brick: 0
ball: 8; brick: 0
ball: 2; brick: 3
ball: 8; brick: 3

Explanation:

Step1: Calculate the momentum of the ball

The formula for momentum is \(p = mv\). For the ball, \(m = 2\space kg\) and \(v=4\space m/s\). So \(p_{ball}=2\times4 = 8\space\frac{kg\cdot m}{s}\).

Step2: Calculate the momentum of the brick

The brick is not moving, so its velocity \(v = 0\space m/s\). Using the formula \(p = mv\), with \(m = 3\space kg\) and \(v = 0\space m/s\), we get \(p_{brick}=3\times0=0\space\frac{kg\cdot m}{s}\).

Answer:

ball: 8; brick: 0