Ana Exerts A Force Of 20 N On A Volleyball That Has A Mass Of 0.15 Kg. What Is The Force That The Volleyball Exerts On Ana?A. 0.15 N B. 20 N C. 19.85 N D. 20.15 N
Newton's Third Law of Motion: Explaining the Force Exerted by the Volleyball on Ana
Newton's third law of motion states that for every action, there is an equal and opposite reaction. This fundamental principle in physics helps us understand the forces that act between objects in a closed system. In this article, we will apply Newton's third law to a real-world scenario involving Ana and a volleyball to determine the force exerted by the volleyball on Ana.
Understanding Newton's Third Law
Newton's third law of motion is often summarized as "for every action, there is an equal and opposite reaction." This means that if object A exerts a force on object B, then object B will exert an equal and opposite force on object A. The direction of the force is opposite, but the magnitude of the force is the same.
Applying Newton's Third Law to the Scenario
In the given scenario, Ana exerts a force of 20 N on a volleyball with a mass of 0.15 kg. To determine the force exerted by the volleyball on Ana, we can use Newton's third law. Since the force exerted by Ana on the volleyball is 20 N, the force exerted by the volleyball on Ana will be equal in magnitude but opposite in direction.
Calculating the Force Exerted by the Volleyball on Ana
To calculate the force exerted by the volleyball on Ana, we can use the following formula:
F = -F_{action}
where F is the force exerted by the volleyball on Ana, and F_{action} is the force exerted by Ana on the volleyball.
Given that F_{action} = 20 N, we can substitute this value into the formula:
F = -20 N
However, since we are looking for the magnitude of the force, we can ignore the negative sign and take the absolute value of the force:
|F| = 20 N
In conclusion, the force exerted by the volleyball on Ana is equal in magnitude to the force exerted by Ana on the volleyball, which is 20 N. This is a direct application of Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
The correct answer is B. 20 N.
- Newton's third law of motion is a fundamental principle in physics that helps us understand the forces that act between objects in a closed system.
- The force exerted by an object on another object is equal in magnitude but opposite in direction to the force exerted by the second object on the first object.
- Newton's third law of motion has many real-world applications, including the study of collisions, friction, and the motion of objects in a closed system.
Newton's third law of motion has many real-world applications, including:
- Collisions: When two objects collide, the force exerted by one object on the other is equal in magnitude but opposite in direction to the force exerted by the second object on the first object.
- Friction: When an object is in contact with a surface, the force exerted by the surface on the object is equal in magnitude but opposite in direction to the force exerted by the object on the surface.
- Motion of objects in a closed system: When objects are in a closed system, the forces exerted by one object on another are equal in magnitude but opposite in direction to the forces exerted by the second object on the first object.
Examples of Newton's Third Law in Action
- Throwing a ball: When you throw a ball, the force exerted by your hand on the ball is equal in magnitude but opposite in direction to the force exerted by the ball on your hand.
- Walking: When you walk, the force exerted by the ground on your feet is equal in magnitude but opposite in direction to the force exerted by your feet on the ground.
- Driving a car: When you drive a car, the force exerted by the road on the tires is equal in magnitude but opposite in direction to the force exerted by the tires on the road.
Frequently Asked Questions
Q: What is Newton's third law of motion?
A: Newton's third law of motion states that for every action, there is an equal and opposite reaction. This means that if object A exerts a force on object B, then object B will exert an equal and opposite force on object A.
Q: What is the difference between action and reaction forces?
A: Action and reaction forces are equal in magnitude but opposite in direction. The action force is the force exerted by one object on another, while the reaction force is the force exerted by the second object on the first object.
Q: Can you give an example of Newton's third law in action?
A: Yes, a classic example of Newton's third law in action is when you throw a ball. The force exerted by your hand on the ball is equal in magnitude but opposite in direction to the force exerted by the ball on your hand.
Q: How does Newton's third law apply to friction?
A: Newton's third law applies to friction in the sense that the force exerted by a surface on an object is equal in magnitude but opposite in direction to the force exerted by the object on the surface.
Q: Can you explain the concept of a closed system in the context of Newton's third law?
A: A closed system is a system in which the objects are not interacting with any external objects. In a closed system, the forces exerted by one object on another are equal in magnitude but opposite in direction to the forces exerted by the second object on the first object.
Q: What are some real-world applications of Newton's third law?
A: Some real-world applications of Newton's third law include:
- Collisions: When two objects collide, the force exerted by one object on the other is equal in magnitude but opposite in direction to the force exerted by the second object on the first object.
- Friction: When an object is in contact with a surface, the force exerted by the surface on the object is equal in magnitude but opposite in direction to the force exerted by the object on the surface.
- Motion of objects in a closed system: When objects are in a closed system, the forces exerted by one object on another are equal in magnitude but opposite in direction to the forces exerted by the second object on the first object.
Q: Can you explain the concept of action and reaction forces in the context of a car driving on a road?
A: When a car is driving on a road, the force exerted by the road on the tires is equal in magnitude but opposite in direction to the force exerted by the tires on the road. This is an example of Newton's third law in action.
Q: What is the significance of Newton's third law in the context of physics?
A: Newton's third law is a fundamental principle in physics that helps us understand the forces that act between objects in a closed system. It has many real-world applications and is a crucial concept in the study of physics.
Q: Can you explain the concept of Newton's third law in the context of a person walking?
A: When a person is walking, the force exerted by the ground on their feet is equal in magnitude but opposite in direction to the force exerted by their feet on the ground. This is an example of Newton's third law in action.
In conclusion, Newton's third law of motion is a fundamental principle in physics that helps us understand the forces that act between objects in a closed system. The force exerted by an object on another object is equal in magnitude but opposite in direction to the force exerted by the second object on the first object. This principle has many real-world applications and is a crucial concept in the study of physics.