Understanding Momentum

* Momentum (p) is a measure of an object's mass in motion. It's calculated by:

* p = m * v

* where:

* m = mass (in kg)

* v = velocity (in m/s)

Calculating the Change in Momentum

1. Initial Momentum:

* p₁ = m * v₁

* p₁ = 8 kg * 2 m/s = 16 kg*m/s

2. Final Momentum:

* p₂ = m * v₂

* Since the ball bounces back at the same speed, but in the opposite direction, its final velocity is -2 m/s.

* p₂ = 8 kg * -2 m/s = -16 kg*m/s

3. Change in Momentum:

* Δp = p₂ - p₁

* Δp = -16 kg*m/s - 16 kg*m/s = -32 kg*m/s

Answer: The change in momentum of the bowling ball is -32 kg*m/s. The negative sign indicates that the momentum changed direction.