According to Newton’s third law of motion, which statement is always correct?

a. If two moving objects collide, then they will bounce off each other.
b. If a moving object hits another object, then the second object will push back.
c. If two moving objects collide, then both will stop moving.
d. If a moving object hits another object, then the second object will start moving

3 answers

According to Newton’s third law of motion, the statement that is always correct is:

b. If a moving object hits another object, then the second object will push back.

Newton's third law states that for every action, there is an equal and opposite reaction. This means that when one object exerts a force on a second object, the second object exerts an equal and opposite force back on the first object. The other statements may not be universally accurate. For example, two colliding objects may not necessarily bounce off each other (as in option a), they might not stop moving (as in option c), and the second object may not start moving if it is stationary and immovable (as in option d).

isnt it a

Let’s clarify Newton's third law of motion in relation to the provided options:

Newton's Third Law of Motion: It states that for every action, there is an equal and opposite reaction. This means that when one 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.

Now, let's evaluate the options:

a. If two moving objects collide, then they will bounce off each other.

  • This is not always true. Inelastic collisions can occur where the objects do not bounce off each other but rather stick together or deform.

b. If a moving object hits another object, then the second object will push back.

  • This statement is true and is a direct application of Newton's third law. The second object exerts an equal and opposite force on the first object.

c. If two moving objects collide, then both will stop moving.

  • This is not true. They can collide and continue moving after the collision, depending on the type of collision.

d. If a moving object hits another object, then the second object will start moving.

  • This is not necessarily true. If the second object is fixed or immovable (like a wall), it won't start moving.

Therefore, the best answer that universally applies to Newton's third law is indeed b. The option a is not universally correct because it depends on the type of collision, whether it is elastic or inelastic. So, while option a may occur in some scenarios, it is not accurate for all cases.