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Solved: (a) During an ice skating performance, an
Chapter 8, Problem 44(choose chapter or problem)
Problem 44PE
(a) During an ice skating performance, an initially motionless 80.0-kg clown throws a fake barbell away. The clown’s ice skates allow her to recoil frictionlessly. If the clown recoils with a velocity of 0.500 m/s and the barbell is thrown with a velocity of 10.0 m/s, what is the mass of the barbell? (b) How much kinetic energy is gained by this maneuver? (c) Where does the kinetic energy come from?
Questions & Answers
QUESTION:
Problem 44PE
(a) During an ice skating performance, an initially motionless 80.0-kg clown throws a fake barbell away. The clown’s ice skates allow her to recoil frictionlessly. If the clown recoils with a velocity of 0.500 m/s and the barbell is thrown with a velocity of 10.0 m/s, what is the mass of the barbell? (b) How much kinetic energy is gained by this maneuver? (c) Where does the kinetic energy come from?
ANSWER:
Part (a)
Step 1 of 6:
A clown throws away a fake barbell on the surface of the ice. The surface is frictionless and after throwing the barbell, the clown experiences a recoil velocity in the negative x-direction and the barbell moves in the positive x-direction. Both of them initially at rest and the initial momentum of the system is zero. Now we are going to find out the mass of the ball. The given quantities are
The mass of the clown
The recoil velocity of the clown
The velocity of the barbell
