Question

1. the momentum of a 100 kg football player who is moving at 3.5 m/s is (a) 600 kgm/s (b) 350 kgm/s (c) 16.67 kgm/s (d) none of the above 17. what is the momentum of a 2 kg shell fired from a cannon with a speed of 0.5 m/s? (a) 1 kgm/s (b) 2 kgm/s (c) 4 kgm/s (d) 0.25 kgm/s (e) none of the above

Explanation:

Step1: Recall momentum formula

The formula for momentum is $p = mv$, where $p$ is momentum, $m$ is mass and $v$ is velocity.

Step2: Solve for 16th question

Given $m = 100\ kg$ and $v=3.5\ m/s$. Then $p=mv = 100\times3.5=350\ kg\cdot m/s$.

Step3: Solve for 17th question

Given $m = 2\ kg$ and $v = 0.5\ m/s$. Then $p=mv=2\times0.5 = 1\ kg\cdot m/s$.

Answer:

1. B. 350 kgm/s
2. A. 1 kgm/s