Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Textbook Question
Chapter 7, Problem 25A
Your weight is the result of the gravitational force of Earth on your body. What is the corresponding reaction force?
Expert Solution & Answer
To determine
The reaction force for the given situation.
Answer to Problem 25A
A body is pulling on Earth.
Explanation of Solution
Introduction:
The gravitational attraction on the Earth by any of the object generates a force. Also the weight is fundamentally different from all the mechanical forces in which the object is in physical contact with air that generates a force.
The Earth is massive than a person’s body. When the Earth is pulling down on a person, his weight is the result of standing on the ground. So, to keep a person motionless the reaction force from the ground acts on a person in upward direction. If there was no upward force then the person would be accelerating downwards.
Conclusion:
Therefore, the corresponding reaction force is that the body of a person is pulling on Earth.
Chapter 7 Solutions
Conceptual Physics: The High School Physics Program
Ch. 7 - Can an action force exist without a reaction...Ch. 7 - When a hammer exerts a force on a nail, how does...Ch. 7 - When you walk on a floor, what pushes you along?Ch. 7 - State Newtons third law of motion.Ch. 7 - Consider hitting a baseball with a bat. If we call...Ch. 7 - If a bat hits a ball with 1000 N of force, can the...Ch. 7 - If the world pulls you downward against your...Ch. 7 - When a cannon is fired, are the forces on the...Ch. 7 - When a cannon is fired, why do the cannon-ball and...Ch. 7 - Identify the force that propels a rocket.
Ch. 7 - How does a helicopter get its lifting force?Ch. 7 - True or false: When a net force is exerted on a...Ch. 7 - When can two kicks on a soccer ball produce a net...Ch. 7 - Prob. 14ACh. 7 - Referring to Figure 7.14, how many horizontal...Ch. 7 - How many horizontal forces are exerted on the...Ch. 7 - How many horizontal forces are exerted on the...Ch. 7 - If you hit a wall with a force of 200 N, how much...Ch. 7 - Can you physically touch another person without...Ch. 7 - Fill in the blanks: Newtons first law is often...Ch. 7 - Three sets of double boxes rest on a table. Rank...Ch. 7 - A van exerts a force on trailers of different...Ch. 7 - Each of these boxes is pulled by the same force F...Ch. 7 - Prob. 24ACh. 7 - Your weight is the result of the gravitational...Ch. 7 - Why can you exert greater force on the pedals of a...Ch. 7 - Consider the two forces acting on a person who...Ch. 7 - If you walk on a log that is floating in the...Ch. 7 - Why is it easier to walk on a carpeted floor than...Ch. 7 - If you step off a ledge, you accelerate noticeably...Ch. 7 - When a racquet hits a tennis ball, action and...Ch. 7 - Suppose you're weighing yourself while standing...Ch. 7 - When a high jumper leaves the ground, what is the...Ch. 7 - What is the reaction force to an action force of...Ch. 7 - If action equals reaction, why isnt Earth pulled...Ch. 7 - A small car bumps into a van at rest in a parking...Ch. 7 - Does your answer to question 36 depend on the...Ch. 7 - A speeding bus makes contact with a bug that...Ch. 7 - Consider two carts, one twice as massive as the...Ch. 7 - Some people used to think that a rocket could not...Ch. 7 - Since the force that acts on a cannonball when a...Ch. 7 - Suppose you exert 200 N on your refrigerator and...Ch. 7 - The photo shows Steve Hewitt and his daughter...Ch. 7 - Hold your hand like a flat wing outside the window...Ch. 7 - Your teacher challenges you and your best friend...Ch. 7 - A pair of 50-N weights are attached to a spring...Ch. 7 - The strong man can withstand the tension force...Ch. 7 - A balloon floats motionless in the air. A...Ch. 7 - When you get up from a sitting position, do your...Ch. 7 - When a weightlifter jerks a barbell over his head,...Ch. 7 - Identify two pairs of action-reaction forces that...Ch. 7 - A car of mass m cruises along the highway at a...Ch. 7 - What will be the acceleration of recoil when a...Ch. 7 - Two people attempt a tug-of-war on low-friction...Ch. 7 - Two blocks, one three times as massive as the...Ch. 7 - What is the net force on a falling 100-N barrel...Ch. 7 - Amanda looks at a 1.0-kg bag of jellybeans resting...Ch. 7 - When 56-kg Diane on rollerskates pushes against a...Ch. 7 - A 7.00-kg bowling ball moving at 8.0 m/s strikes a...Ch. 7 - A 70-kg skydiver is falling at her terminal speed....Ch. 7 - Gymnast Gracie of weight mg is suspended by a pair...
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- Example Two charges, one with +10 μC of charge, and another with - 7.0 μC of charge are placed in line with each other and held at a fixed distance of 0.45 m. Where can you put a 3rd charge of +5 μC, so that the net force on the 3rd charge is zero?arrow_forward* Coulomb's Law Example Three charges are positioned as seen below. Charge 1 is +2.0 μC and charge 2 is +8.0μC, and charge 3 is - 6.0MC. What is the magnitude and the direction of the force on charge 2 due to charges 1 and 3? 93 kq92 F == 2 r13 = 0.090m 91 r12 = 0.12m 92 Coulomb's Constant: k = 8.99x10+9 Nm²/C² ✓arrow_forwardMake sure to draw a Free Body Diagram as wellarrow_forward
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