A child of mass 40.0 kg is in a roller coaster car that travels in a loop of radius 7.80 m. At point A the speed of the car is 10.6 m/s, and at point B, the speed is 11.5 m/s. Assume the child is not holding on and does not wear a seat belt. A B 30° (a) What is the force (in N) of the car seat on the child at point A? (Enter the magnitude.) N (b) What is the force (in N) of the car seat on the child at point B? (Enter the magnitude.) N (c) What minimum speed (in m/s) is required to keep the child in his seat at point A? m/s

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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A child of mass 40.0 kg is in a roller coaster car that travels in a loop of radius 7.80 m. At point A the speed of the car is 10.6 m/s,
and at point B, the speed is 11.5 m/s. Assume the child is not holding on and does not wear a seat belt.
A
80
30°
(a) What is the force (in N) of the car seat on the child at point A? (Enter the magnitude.)
N
(b) What is the force (in N) of the car seat on the child at point B? (Enter the magnitude.)
N
(c) What minimum speed (in m/s) is required to keep the child in his seat at point A?
m/s
Transcribed Image Text:A child of mass 40.0 kg is in a roller coaster car that travels in a loop of radius 7.80 m. At point A the speed of the car is 10.6 m/s, and at point B, the speed is 11.5 m/s. Assume the child is not holding on and does not wear a seat belt. A 80 30° (a) What is the force (in N) of the car seat on the child at point A? (Enter the magnitude.) N (b) What is the force (in N) of the car seat on the child at point B? (Enter the magnitude.) N (c) What minimum speed (in m/s) is required to keep the child in his seat at point A? m/s
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