A child (m = 40 kg) is playing on a merry-go-round (m = 200 kg, R =
Question:
A child (m = 40 kg) is playing on a merry-go-round (m = 200 kg, R = 2.0 m) that is initially at rest. The child then jumps off in a direction tangent to the edge of the merry-go-round as shown in Figure P9.38. The child has a speed of 5.0 m/s just before she lands on the ground.?
(a) Identify a system for which the total external torque is zero.?
(b) What is the initial angular momentum of your system??
(c) Make a sketch showing your system just before and just after the child jumps off the merry-go-round.?
(d) If the final angular velocity of the merrygo-round is??f, what is the final angular momentum of the merrygo-round and of the child? Express your answers in terms of??f.
(e) What is the final angular velocity of the merry-go-round?
Concerned with the magnitude of the angular momentum, not its sign.
Figure P9.38
?
Step by Step Answer:
College Physics Reasoning and Relationships
ISBN: 978-0840058195
2nd edition
Authors: Nicholas Giordano