Question

**Problem Statement**

A 50 kg boy is sitting in a roller coaster car that at one point along the track goes in a vertical circular loop of radius 25 m. At the top of the loop the roller coaster’s speed is 20 m/s. What is the normal force on the boy from the seat?

**Visual Representation**

• Draw a sketch of the problem

• Identify “the system” by circling the object of interest

• Establish a coordinate system and define symbols

• Draw a motion diagram for “the system” and determine

• Make a free-body diagram showing all the forces acting on “the system”

• List knowns and desired unknowns

**Mathematical Representation**

• Write down Newton’s second law in component form

• Use the free-body diagram to obtain the force components for Newton’s laws

• Solve equation(s) for the desired unknown

• Substitute in the known values, including units, and calculate unknown value

• Check units and assess if your answer is reasonable

Answer #1

The solution is given below.

Thank you.

2. PLEASE READ THE INSTRUCTIONS CAREFULLY. DRAW SKETCH
AND DIAGRAM AND FREE-BODY DIAGRAM, LIST KNOWNS AND UNKNOWNS
PLEASE.
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3.13.6
Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
35,494 J of potential energy, how many meters above ground is the
car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
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Question 110 pts
A 319 kg motorcycle is parked in a parking garage. If the car has
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car? Report your answer to 1 decimal place. Please do not include
units or the answer will be marked incorrect.
Flag this Question
Question 210 pts
A box sitting on the top of a hill has 252 J of potential energy.
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