Conceptual Physical Science Explorations
2nd Edition
ISBN: 9780321567918
Author: Paul G. Hewitt, Leslie A. Hewitt, John A Suchocki
Publisher: Addison Wesley
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Textbook Question
Chapter 4, Problem 8RQ
If the world pulls you downward, what is the reaction force?
Expert Solution & Answer
To determine
The reaction force when the world pulls a person downwards.
Answer to Problem 8RQ
The reaction force is the force exerted by the person back on the world.
Explanation of Solution
From Newton’s third law, an equal magnitude of force comes whenever there is an action force on one body due to other.
Here, the interaction of forces takes place between the person and the world, and the action force is the pull of the world in the downward direction due to which the person pushes a reaction force on the world. This reaction force is equal in quantity with the downward pull.
Conclusion:
Therefore, the reaction force is the force exerted by the person back on the world.
Chapter 4 Solutions
Conceptual Physical Science Explorations
Ch. 4 - In the simplest sense, a force is a push or pull....Ch. 4 - How many forces are required for interaction? How...Ch. 4 - When you push against a wall with your fingers,...Ch. 4 - Why do we say a speeding object doesnt possess...Ch. 4 - State Newtons third law of motion.Ch. 4 - Consider hitting a baseball with a bat. If we call...Ch. 4 - If a bat hits a ball with 1000N of force, with how...Ch. 4 - If the world pulls you downward, what is the...Ch. 4 - If the forces that act on a cannonball and the...Ch. 4 - Identify the force that propels a rocket.
Ch. 4 - When can the net force on a ball be zero when you...Ch. 4 - Why do the interatomic forces inside a ball not...Ch. 4 - Referring to Figure 4.13, how many forces are...Ch. 4 - How many forces are exerted on the horse? What is...Ch. 4 - How many forces are exerted on the horse-cart...Ch. 4 - Which is most important in winning a...Ch. 4 - How does a helicopter get its lifting force?Ch. 4 - A boxer can hit a heavy bag with great force. Why...Ch. 4 - Can you physically touch another person without...Ch. 4 - Fill in the blanks: Newtons first law is often...Ch. 4 - The photo shows Steve Hewitt and daughter...Ch. 4 - For each of the following interactions, identify...Ch. 4 - You hold an apple over your head. (a) Identify all...Ch. 4 - Identity the action-reaction pairs of forces for...Ch. 4 - Consider a tennis player hitting a ball. (a)...Ch. 4 - A small car bumps into a van at rest in a parking...Ch. 4 - Your teacher challenges you and your best friend...Ch. 4 - You push a heavy car by hand. The car, in turn,...Ch. 4 - A farmer urges his horse to pull a wagon. The...Ch. 4 - Suppose two carts, one twice as massive as the...Ch. 4 - If you exert a horizontal force of 200N to slide a...Ch. 4 - If a massive truck and small sports car have a...Ch. 4 - Ken and Joanne are astronauts floating some...Ch. 4 - The strong man can withstand the tension force...Ch. 4 - In a tug-of-war between two physics types, each...Ch. 4 - A stone is shown at rest on the ground. (a) The...Ch. 4 - Here a stone is suspended at rest by a string. (a)...Ch. 4 - Suppose the string in the preceding exercise...Ch. 4 - What is the acceleration of the stone in Think and...Ch. 4 - If you apply a net force of 5N on a cart with a...Ch. 4 - If you increase the speed of a 2.0-kg air puck by...Ch. 4 - A boxer punches a sheet of paper in midair and...Ch. 4 - Joshua has a mass of 60kg and stands next to a...Ch. 4 - A soccer ball is kicked to a 30-m/s speed. While...Ch. 4 - A batted baseball soaring through the air with...Ch. 4 - A karate chop delivers a force of 3000N to a board...Ch. 4 - A soccer ball is kicked to a 30-m/s speed. While...Ch. 4 - When a cannonball is fired from a cannon, both the...Ch. 4 - The force that propels a rocket is provided by (a)...Ch. 4 - The team that wins in a tug-of-war is the team...Ch. 4 - The net force on a kicked football can be zero...Ch. 4 - The heavyweight boxing champion of the world cant...
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