A 0.20 kg handball is bounced vertically off the floor. It hits the floor moving 20....

Question

Question

A 0.20 kg handball is bounced vertically off the floor. It hits the floor moving 20. m/s and rebounds at 15. m/s. What is the momentum change?

3.0 N-s

1.0 N-s

4.0 N-s

7.0 N-s

Answer 1

Answer #1

momentum (p) = mass (m) x velocity(v)

change in momentum = mass x (change in v)
=> 0.20 ( -20 -15) => 0.20 * (35) = 7.0 N-s

(consider the negative and plus signs for velocity directions)

Answer 2

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