Author Question: A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as ... (Read 157 times)

evelyn o bentley · **on:** Aug 1, 2020

Question 1

A 3.0-kg ball with an initial velocity of (4+ 3) m/s collides with a wall and rebounds with a velocity of (−4 + 3) m/s. What is the impulse exerted on the ball by the wall?

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+24N

s

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−24 N

s

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+18 N

s

◦

−18 N

s

◦

+8.0 N

s

Question 2

A 3.0-kg mass is released from rest at point A of a circular frictionless track of radius 0.40 m as shown in the figure. The mass slides down the track and collides with a 1.4-kg mass that is initially at rest on a horizontal frictionless surface. If the masses stick together, what is their speed after the collision?

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2.1 m/s

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1.7 m/s

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1.9 m/s

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1.5 m/s

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2.3 m/s

peter · **Reply #1 on:** Aug 1, 2020

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