When someone jumps down on a trampoline, that person is propelled upwards. Choose the best statement describing how this demonstrates Newton’s third law.

Question

Responses:

The direction of the motion is changed by the surface area of the jumper that comes in contact with the trampoline.

The color of the trampoline’s jumping surface can affect the reaction force.

The style of the jumper’s footwear affects the first action of compressing the jumping surface.

The trampoline pushes back with equal force but in the opposite direction.

Answer 1

The best statement describing how jumping on a trampoline demonstrates Newton’s third law is:

The trampoline pushes back with equal force but in the opposite direction.

This accurately reflects Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. When the jumper lands on the trampoline, they exert a force downward, and the trampoline exerts an equal force upward, propelling the jumper into the air.

Answer 2

When inflating a balloon, which of the following represents an equal but opposite force acting on the balloon?
Responses:

the expansion of the balloon

the air entering the balloon

releasing the balloon

tying the balloon

Answer 3

The best answer for what represents an equal but opposite force acting on the balloon when inflating it is:

the air entering the balloon.

As air enters the balloon, it exerts an outward force on the walls of the balloon (the action), and in response, the balloon exerts an equal and opposite force inward (the reaction). This is consistent with Newton's third law of motion.

Answer 4

A force of 30 N to the right is applied to an object. An opposite force of 20 N to the left is applied to the same object. What is the net force applied to the object?
Responses

10 N to the left

50 N to the right

50 N to the left

10 N to the right

Answer 5

To find the net force applied to the object, you need to combine the forces acting on it.

You have:

• A force of 30 N to the right.
• An opposite force of 20 N to the left.

To calculate the net force, you subtract the leftward force from the rightward force:

Net force = 30 N (to the right) - 20 N (to the left) = 10 N (to the right).

So, the correct answer is:

10 N to the right.

Answer 6

Two objects with the same mass have the same force applied to them. What can be said of their acceleration? Responses:

Their acceleration will depend on their weight, which is not provided.

Their acceleration will be different.

Their acceleration will be the same.

Their acceleration will depend on their net force, which is not provided.

Answer 7

If two objects with the same mass have the same force applied to them, according to Newton's second law of motion (F = ma), their accelerations will be the same. Since the mass (m) is the same and the force (F) is also the same, the resulting acceleration (a) must also be the same.

Therefore, the correct answer is:

Their acceleration will be the same.

Answer 8

What do force diagrams show?
Responses

the acceleration of forces acting on an object

the balanced forces acting on an object

the mass of forces acting on an object

the magnitude and direction of forces acting on an object

Answer 9

Force diagrams, often known as free-body diagrams, illustrate the forces that are acting on an object along with their directions and magnitudes.

Therefore, the correct answer is:

the magnitude and direction of forces acting on an object.