## Buffy is rolling along in her 10.4 kg wagon at 3.4 m/s (in the positive direction) when she jumps off the back. She continues to move forwar

Question

Buffy is rolling along in her 10.4 kg wagon at 3.4 m/s (in the positive direction) when she jumps off the back. She continues to move forward at 1.7 m/s relative to the ground. This causes her wagon to go speeding forward at 8.04 m/s relative to the ground. How much does Buffy weigh

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3 months 2021-07-19T22:17:51+00:00 1 Answers 3 views 0

Buffy weigh’s 28.39 kg

Explanation:

Given;

mass of Buffy and wagon, M = 10.4 kg

final velocity of Buffy – wagon system, v = 3.4 m/s

Buffy’s velocity relative to the ground, u₁ = 1.7 m/s

Wagon’s velocity relative to the ground, u₂ = 8.04 m/s

Buffy’s velocity = 1.7 – 3.4 = – 1.7 m/s

Wagon’s velocity = 8.04 – 3.4 = 4.64 m/s

Apply the principle of conservation of linear momentum;

1.7 x m = 4.64 x 10.4

where;

m is mass of wagon

1.7 m = 48.256

m = 48.256 / 1.7

m = 28.39 kg

Therefore, Buffy weigh’s 28.39 kg