Lesson 4 : Newton's Third Law Of Motion

1. For every action, there is an equal and opposite reaction.

True

False

This statement is known as Newton's third law of motion. It states that for every action, there is an equal and opposite reaction. This means that whenever an object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. This law is applicable to various scenarios, such as the recoil of a gun when it is fired or the movement of a boat when rowing against the water. Therefore, the given statement is true.

Explanation

This statement is known as Newton's third law of motion. It states that for every action, there is an equal and opposite reaction. This means that whenever an object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. This law is applicable to various scenarios, such as the recoil of a gun when it is fired or the movement of a boat when rowing against the water. Therefore, the given statement is true.

2. For every action, there is an equal and opposite reaction.

True

False

This statement is based on Newton's third law of motion, which states that for every action force, there is an equal and opposite reaction force. This means that whenever an object exerts a force on another object, the second object exerts an equal and opposite force back on the first object. This principle is observed in various scenarios, such as when a person pushes against a wall, the wall pushes back with an equal force. Therefore, the statement is true.

Explanation

This statement is based on Newton's third law of motion, which states that for every action force, there is an equal and opposite reaction force. This means that whenever an object exerts a force on another object, the second object exerts an equal and opposite force back on the first object. This principle is observed in various scenarios, such as when a person pushes against a wall, the wall pushes back with an equal force. Therefore, the statement is true.

3. According to Newton's third law, for every action force there is an equal (in size) and opposite (in direction) reaction force. Forces always come in pairs - known as "action-reaction force pairs."

True

False

Newton's third law states that for every action force, there is an equal and opposite reaction force. This means that whenever an object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. This is known as an action-reaction force pair. Therefore, the statement "For every action force there is an equal and opposite reaction force" is true.

Explanation

Newton's third law states that for every action force, there is an equal and opposite reaction force. This means that whenever an object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. This is known as an action-reaction force pair. Therefore, the statement "For every action force there is an equal and opposite reaction force" is true.

4.

Describe the other force in the action-reaction force pair.

Pin pushes bowling ball rightward.

Pin pushes bowling ball upward.

Pin pushes bowling ball downward.

None of the above.

The other force in the action-reaction force pair is the bowling ball pushing the pin leftward. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. So, while the pin is pushing the bowling ball rightward, the bowling ball is exerting an equal and opposite force on the pin in the leftward direction.

Explanation

The other force in the action-reaction force pair is the bowling ball pushing the pin leftward. According to Newton's third law of motion, for every action, there is an equal and opposite reaction. So, while the pin is pushing the bowling ball rightward, the bowling ball is exerting an equal and opposite force on the pin in the leftward direction.

5. Describe the other force in the action-reaction force pair.

The glove pushes the baseball rightward.

The glove pushes the baseball upward.

The glove pushes the baseball downward.

None of the above.

The correct answer is "The glove pushes the baseball rightward." In an action-reaction force pair, for every action force, there is an equal and opposite reaction force. In this case, the action force is the glove pushing the baseball rightward. The reaction force is the baseball pushing the glove leftward with the same amount of force.

Explanation

The correct answer is "The glove pushes the baseball rightward." In an action-reaction force pair, for every action force, there is an equal and opposite reaction force. In this case, the action force is the glove pushing the baseball rightward. The reaction force is the baseball pushing the glove leftward with the same amount of force.

6. Describe the other force in the action-reaction force pair.

Balloon wall pushes enclosed air particles inwards.

Balloon wall pushes enclosed air particles outwards.

Balloon wall pushes enclosed air particles upwards.

None of the above.

The correct answer is "Balloon wall pushes enclosed air particles inwards." When the balloon wall pushes the enclosed air particles inwards, it creates an action force. According to Newton's third law of motion, there is an equal and opposite reaction force. Therefore, the reaction force in this action-reaction force pair is that the enclosed air particles push the balloon wall outwards.

Explanation

The correct answer is "Balloon wall pushes enclosed air particles inwards." When the balloon wall pushes the enclosed air particles inwards, it creates an action force. According to Newton's third law of motion, there is an equal and opposite reaction force. Therefore, the reaction force in this action-reaction force pair is that the enclosed air particles push the balloon wall outwards.

7. According to Newton's third law,The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

True

False

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Newton's third law states that for every action, there is an equal and opposite reaction. Therefore, the statement in the question is incorrect.

Explanation

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Newton's third law states that for every action, there is an equal and opposite reaction. Therefore, the statement in the question is incorrect.