Problem 4: Amerry-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. 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. 1= 178 / Correct! Part (b) Immediately before the boy jumps on the merry round, calculate his angular speed (in radians/second) about the central axis of the merry-go-round. 01 = 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. w2 = 0.5 vCorrect! 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 half way between the edge and the center of the merry go round?
Problem 4: Amerry-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. 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. 1= 178 / Correct! Part (b) Immediately before the boy jumps on the merry round, calculate his angular speed (in radians/second) about the central axis of the merry-go-round. 01 = 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. w2 = 0.5 vCorrect! 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 half way between the edge and the center of the merry go round?
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
Transcribed Image Text:Problem 4: Amerry-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.
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 · m?.
/ Correct!
I= 178
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.
/ Correct!
227 - ן"
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.
/ Correct!
w2 = 0.5
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 half way between the edge and the center of the merry go round?
V Correct!
O3 = 0.59
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 of the merry go round?
/ Correct!
w4 = 0.65
Part (f) Finally, the boy decides that he has had enough fun. He decides to crawl to the outer edge of the merry-go-round and jump off. Somehow,
he manages to jump in such a way that he hits the ground with zero velocity with respect to the ground. What is the angular speed in radians/second of the
merry-go-round after the boy jumps off?
ws = 0.63|
sin()
cos()
tan()
7
9
НОМE
cotan()
asin()
acos()
E
4
5
6
atan()
acotan()
sinh()
1| 2
3
cosh()
tanh()
cotanh()
END
O Degrees O Radians
vol BACKSPACE
DEL
CLEAR
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