Impulse equals change in momentum. If a 1.0 kg object experiences a 8 N force for 0.5 s, what is the resulting change in velocity? (Assume initial velocity is zero.)

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Multiple Choice

Impulse equals change in momentum. If a 1.0 kg object experiences a 8 N force for 0.5 s, what is the resulting change in velocity? (Assume initial velocity is zero.)

Explanation:
Impulse is the change in momentum, and for a constant force impulse equals force times time: J = F Δt. Here that gives J = 8 N × 0.5 s = 4 N·s, which is the change in momentum Δp. With a mass of 1 kg, Δp = m Δv, so Δv = Δp / m = 4 kg·m/s ÷ 1 kg = 4 m/s. Since the initial velocity is zero, the resulting change in velocity is 4 m/s.

Impulse is the change in momentum, and for a constant force impulse equals force times time: J = F Δt. Here that gives J = 8 N × 0.5 s = 4 N·s, which is the change in momentum Δp. With a mass of 1 kg, Δp = m Δv, so Δv = Δp / m = 4 kg·m/s ÷ 1 kg = 4 m/s. Since the initial velocity is zero, the resulting change in velocity is 4 m/s.

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