Question

Question
A cue stick has a mass of 0.5 kg. The cue stick hits a ball with a mass of 0.2 kg at a velocity of 2.5 m/s. What is the velocity of the ball after it is hit? (1 point)
Responses

3.6 m/s
3.6 m/s

2.5 m/s
2.5 m/s

8.3 m/s
8.3 m/s

6.3 m/s
6.3 m/s
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Answer 1

Use conservation of momentum (assuming the cue stops after the hit):

m_cue v_cue = m_ball v_ball
v_ball = (m_cue / m_ball) v_cue = (0.5 / 0.2) × 2.5 = 6.25 ≈ 6.3 m/s

Answer: 6.3 m/s.