Physics Quiz

Isla drops a ball from a height. The force of gravity is exerted between Earth and the ball _____.

• on its surface

• too close to be in free fall

• at any distance

• when it is falling

Hannah is riding her bicycle and notices that she slows down as she approaches a stop sign. Which best demonstrates friction?

• an ice-skater sliding across the ice without noticeably slowing down

• a car rolling to a stop at a traffic light

• a baseball moving in a projectile motion

• the free fall of astronauts in orbit

During a tug-of-war game, Ethan and Nora pull the rope with equal force in opposite directions. The forces that cancel each other are called _____ forces.

• balanced

• inactivated

• neutral

• null

Emma is observing how the speed of a book changes as it slides across a table in a straight line. Over what time interval is the net force on the book in the opposite direction of the book’s motion?

• 0 s to 0.5 s

• 0.5 s to 2.4 s

• 0 s to 2.4 s

• 2 s to 2.4 s

Ethan is swinging a large washer on a string in a circle. The net force is _____.

• toward Ethan's hand

• away from Ethan's hand

• in the direction of motion of the washer

• toward the ground

Michael is pushing a shopping cart with a certain force. According to Newton's second law of motion, the acceleration of the cart is _____.

• F = m/a

• p = m × v

• a = F/m

• p = m/v

Lily is pushing a shopping cart at the grocery store. If she applies more force to the cart, what happens to its acceleration?

• It decreases.

• It fluctuates.

• It increases.

• It stays the same.

When Benjamin pushes against a wall, the wall pushes back with an equal and opposite force. This scenario illustrates _____.

• the law of conservation of momentum

• Newton’s first law of motion

• Newton’s second law of motion

• Newton’s third law of motion

When Aiden drops a ball from a tall building and it reaches terminal velocity, the force of gravity _____ the force of air resistance.

• is unrelated to

• is greater than

• is less than

• equals

When Mason watched a rocket lift off, he noticed that its upward momentum was matched by the downward momentum of _____.

• nothing

• hot gases expelled by the rocket

• air pushed out of the way by the rocket

• the launch pad