Understanding Impulse

Impulse is the change in momentum of an object. It's represented by the following equation:

* Impulse (J) = Change in Momentum (Δp)

Calculating Momentum

Momentum (p) is calculated as:

* Momentum (p) = mass (m) * velocity (v)

Solving the Problem

1. Initial Momentum:

* Mass (m) = 7.2 kg

* Initial Velocity (v₁) = 1.2 m/s

* Initial Momentum (p₁) = 7.2 kg * 1.2 m/s = 8.64 kg*m/s

2. Final Momentum:

* The ball stops, so its final velocity (v₂) = 0 m/s

* Final Momentum (p₂) = 7.2 kg * 0 m/s = 0 kg*m/s

3. Change in Momentum:

* Δp = p₂ - p₁ = 0 kg*m/s - 8.64 kg*m/s = -8.64 kg*m/s

4. Impulse:

* Impulse (J) = Δp = -8.64 kg*m/s

Magnitude of Impulse:

The magnitude of impulse is the absolute value of the impulse, which is:

* |J| = 8.64 kg*m/s

Therefore, the magnitude of the impulse on the ball is 8.64 kg*m/s.