Physics Quiz

What is the net force acting on a book resting on a table?

• It depends on the book's mass.

• It is always equal to the gravitational force.

• It is zero.

• It cannot be determined without more information.

Thomas is pushing a shopping cart with a certain mass at an acceleration. According to Newton's second law of motion, what is the equation that relates the force Thomas applies, the mass of the cart, and the acceleration of the cart?

If George doubles the mass of his car while the force to push it remains constant, what happens to the acceleration of the car?

• It doubles.

• It remains the same.

• It is halved.

• It quadruples.

Rosie is conducting an experiment in her physics class to measure the force required to move a 5kg block across a table. Which unit should she use to report her findings in accordance with the International System of Units (SI)?

• Kilogram (kg)

• Newton (N)

• Joule (J)

Why does it require more effort for Arthur to start pushing a parked car than it does for him to start pushing a bicycle?

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

• None of the above

When Thomas pushes a skateboard, it pushes back with an equal force. What does this illustrate?

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

• The acceleration of a skateboard is directly proportional to the net force Thomas applies.

• A skateboard at rest stays at rest, and a skateboard in motion stays in motion unless acted upon by an external force.

• The force of gravity acts between all masses in the universe.

Isabelle is trying to loosen a rusty bolt with a wrench. What does the effectiveness of Isabelle's effort depend on?

• Only the force she applies

• Only the length of the wrench

• Both the force she applies and the length of the wrench

• Neither the force she applies nor the length of the wrench

Samuel applies a force of 10 N to a wrench at a distance of 0.5 m from the pivot while working on his bicycle. What is the moment of force?

• 5 Nm

• 10 Nm

• 15 Nm

• 20 Nm

While playing tug of war, Eesha noticed that despite applying a lot of force, her team couldn't win. Which of the following forces acting during the game is NOT a contact force?

• Frictional force between the shoes and the ground

• Tension force in the rope

• Gravitational force pulling the participants towards Earth

• Normal force from the ground on the participants' feet

Imagine Samuel and Mira are playing with a ball in space. If they move the ball so that it is half the distance from Samuel to Mira than it was before, what happens to the gravitational force between Samuel and the ball?

• It is halved.

• It remains the same.

• It is doubled.

• It is quadrupled.