Newton's First Law of Motion Quiz

What happens to the net force when forces act in the same direction?

• It increases

• It remains the same

• It decreases

• It becomes negative

When forces act in opposite directions, how is the net force calculated?

• It is multiplied

• It is added

• It is subtracted

• It is divided

What is the net force if a dog pulls forward on a leash with a force of 75 N and the girl pulls the dog back on the leash with a force of 50 N?

• 100 N

• 75 N

• 50 N

• 25 N

What does the net force help predict about an object's motion?

• Its temperature

• Its acceleration

• Its weight

• Its color

According to Newton's first law of motion, what happens to an object at rest when the forces on it are balanced?

• It changes color

• It disappears

• It stays at rest

• It moves

What happens to an object in motion when the forces on it are balanced?

• It speeds up

• It stays in motion with constant velocity

• It slows down

• It changes direction

What happens to an object when unbalanced forces act on it?

• It accelerates

• It decelerates

• It remains the same

• It disappears

If the net force on a moving cart acts in the direction that the cart is moving, what happens to the cart?

• It speeds up

• It stops

• It slows down

• It changes direction

What does the first part of Newton's first law of motion say about an object at rest?

• It disappears if the forces on it are balanced

• It moves even if the forces on it are balanced

• It changes color if the forces on it are balanced

• It stays at rest if the forces on it are balanced

What does the second part of Newton's first law of motion say about an object in motion?

• It speeds up if the forces on it are balanced

• It stays in motion with constant velocity if the forces on it are balanced

• It changes direction if the forces on it are balanced

• It slows down if the forces on it are balanced