Physics Fundamentals
2nd Edition
ISBN: 9780971313453
Author: Vincent P. Coletta
Publisher: PHYSICS CURRICULUM+INSTRUCT.INC.
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Chapter 4, Problem 2Q
To determine
The force responsible for the forward motion of a person who is thrown forward when brakes are applied suddenly to the car.
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Two people are pushing a truck across a parking lot. The truck has a mass of about 2 × 103 kg.
First, they take turns pushing. When Person A pushes the truck, the truck accelerates at a rate of 1 m/s2. When Person
B pushes the truck, it accelerates at a rate of 2 m/s?.
(a) Both people stand behind the truck and push in the same direction. What is the net force on the truck? At what
rate will the truck accelerate?
(b) Person A stands at the back of the truck and Person B stands at the front, and they push in opposite directions.
What is the net force on the truck? At what rate will the truck accelerate? In what direction?
For both (a) and (b), draw a picture indicating the forces applied by A and B as well as the motion of the truck.
Two people are pushing a truck across a parking lot. The truck has a mass of about 2 × 10 kg. First, they take turns pushing. When Person A pushes the truck, the truck accelerates at a rate of 1 m/s?. When Person B pushes the truck, it accelerates at a rate of 2 m/s?(a) Both people stand behind the truck and push in the same direction. What is the net force on the truck? At what rate will the truck accelerate?(b) Person A stands at the back of the truck and Person B stands at the front, and they push in opposite directions. What is the net force on the truck? At what rate will the truck accelerate? In what direction?For both (a) and (b), draw a picture indicating the forces applied by A and B as well as the motion of the truck.
Jane, who has a mass of 81.0 kg, is riding at 15.0 m/s in his new car when she must suddenly slam on the brakes for the traffic light. She feels a pull on the seatbelt, and brings her body to a stop in 0.5 s. What average force does the seat belt exert on her?
Chapter 4 Solutions
Physics Fundamentals
Ch. 4 - Prob. 1QCh. 4 - Prob. 2QCh. 4 - Prob. 3QCh. 4 - Prob. 4QCh. 4 - Prob. 5QCh. 4 - Prob. 6QCh. 4 - Prob. 7QCh. 4 - Prob. 8QCh. 4 - Prob. 9QCh. 4 - Prob. 10Q
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