H2P-143
Newton’s second law
H2 Physics · JC 1 · Medium · Newton’s second law
Small steel balls, each of mass 0.050 kg, strike a vertical wall horizontally at 30 m s⁻¹ and rebound horizontally in the opposite direction at 10 m s⁻¹. If 40 balls hit the wall each second, what is the average force on the wall?
- 20 N
- 40 N
- 80 N
- 160 N
Sign in to check your answer and see the hint and the worked explanation. Free on PrepLab High.