Print Calculator Periodic Table Question 10 of 10 Map A sapling learning Nate th

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Print Calculator Periodic Table Question 10 of 10 Map A sapling learning Nate the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. In particular, Nate would often don a protective suit of Bounce-Tex, which he invented, and after working up a high speed on his skateboard, would collide with some object. In this way, he got a gut feel for the physical properties of collisions and succeeded in combining his two passions. On one occasion, the Skate, with a mass of 129 kg, including his armor, hurled himself against a 861-kg stationary statue of Isaac Newton in a perfectly elastic linear collision. As a result, lsaac started moving at 1.55 m/s and Nate bounced backward. What were Nate's speeds immediately before and after the collision? (Enter positive numbers.) Ignore friction with the ground. Before Number m/s After Number m/s *By the way, this brief bio of Nate the Skate is written in the past tense, because not long ago he forgot to put on his e-Tex before colliding with the Washington Monument in a perfectly inelastic collision. We will miss him. O Previous Check Answer Next Ext Hint

Explanation / Answer

Here ,

let his speed before collision is u

speed after collision is v

Usign conservation of momentum

129 * u = 861 * 1.55 - v * 129 ----(1)

as the collision is perfectly elastic ,

coefficient of restitution = 1

1.55 + v = u -----(2)

solving 1 and 2

u = 5.94 m/s

v = 4.39 m/s

his speed before collision is 5.94 m/s

his speed after collision is 4.39 m/s

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