A stationary quarterback is tackled by a 89 kg linebacker travelling with an initial speed of 5.2 m/s. As the two players move together after the collision, they have a speed of 2.7 m/s. What is the mass of the quarterback?

Physics for Scientists and Engineers: Foundations and Connections
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Chapter11: Collisions
Section: Chapter Questions
Problem 40PQ: Initially, ball 1 rests on an incline of height h, and ball 2 rests on an incline of height h/2 as...
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  1. A stationary quarterback is tackled by a 89 kg linebacker travelling with an initial speed of 5.2 m/s. As the two players move together after the collision, they have a speed of 2.7 m/s. What is the mass of the quarterback?
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Step 1

Let the mass of the quarterback be m1

And the mass of the linebacker is (m2)= 89 kg

Initial speed of quarterback (u1)= 0

Initial speed of linebacker (u2)= 5.2 m/s

Common Final speed is (v)= 2.7 m/s

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