Steel pellets, each having a mass of $0.60$ g, drop straight down onto a horizontal plate at a rate of $100$ pellets per minute. They arrive at the plate with a velocity of $5.0\,\text{m s}^{-1}$ and then bounce back with a velocity of $4.0\,\text{m s}^{-1}$. What is the average force exerted on the plate by the pellets?
- A$0.0010\,$N
- B$0.0054\,$N
- C$0.0090\,$N
- D$0.54\,$N