Question

1. The momentum of a 2000-kg elephant charging a hunter at a speed of 7.50 m/s is
2. The momentum of a 0.0400-kg tranquilizer dart fired at a speed of 600 m/s is
3. The momentum of the 90.0-kg hunter running at 7.40 m/s after missing the elephant is

Answer 1

1)

$$p=mv=2000\ kg\cdot7.5\ \dfrac{m}{s}=15000\ \dfrac{kgm}{s}.$$

2)

$$p=mv=0.04\ kg\cdot600\ \dfrac{m}{s}=24\ \dfrac{kgm}{s}.$$

3)

$$p=mv=90\ kg\cdot7.4\ \dfrac{m}{s}=666\ \dfrac{kgm}{s}.$$