Problem 4: A merry-go-round is a playground ride that consists of a large disk mounted to that it can freely rotate in a horizontal plane. The merry-go-round shown is initially at rest, has a radius R = 1.1 meters, and a mass M= 286 kg. A small boy of mass m = 41 kg runs tangentially to the merry-go-round at a speed of v = 2.5 m/s, and jumps on.
Problem 4: A merry-go-round is a playground ride that consists of a large disk mounted to that it can freely rotate in a horizontal plane. The merry-go-round shown is initially at rest, has a radius R = 1.1 meters, and a mass M= 286 kg. A small boy of mass m = 41 kg runs tangentially to the merry-go-round at a speed of v = 2.5 m/s, and jumps on.
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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Transcribed Image Text:**Problem 4:**
A merry-go-round is a playground ride that consists of a large disk mounted to rotate freely in a horizontal plane. The merry-go-round is initially at rest, with a radius \( R = 1.1 \) meters and a mass \( M = 286 \) kg. A small boy of mass \( m = 41 \) kg runs tangentially to the merry-go-round at a speed of \( v = 2.5 \) m/s and jumps on.
**Randomized Variables:**
- \( R = 1.1 \) meters
- \( M = 286 \) kg
- \( m = 41 \) kg
- \( v = 2.5 \) m/s
**Part (a)**
Calculate the moment of inertia of the merry-go-round, in kg·m².
- \( I = 178 \) ✔ Correct!
**Part (b)**
Immediately before the boy jumps on the merry-go-round, calculate his angular speed (in radians/second) about the central axis of the merry-go-round.
- \( \omega_1 = 2.27 \) ✔ Correct!
**Part (c)**
Immediately after the boy jumps on the merry-go-round, calculate the angular speed in radians/second of the merry-go-round and boy.
- \( \omega_2 = 0.5 \) ✔ Correct!
**Part (d)**
The boy then crawls towards the center of the merry-go-round along a radius. What is the angular speed in radians/second of the merry-go-round when the boy is halfway between the edge and the center of the merry-go-round?
- \( \omega_3 = 0.59 \) ✔ Correct!
**Part (e)**
The boy then crawls to the center of the merry-go-round. What is the angular speed in radians/second of the merry-go-round when the boy is at the center?
- Input: \( \omega_4 = 0.63 \)
**Diagram Explanation:**
The diagram shows a merry-go-round with a silhouette of a boy approaching it tangentially. The structure is depicted with various colored sections and handrails, indicating a typical playground setup.
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