Physics Quiz on Forces and Energy

Which of the following is an example of a contact force?

• Sun’s Heat

• Pushing a door

• Gravity pulling a falling apple

I want to slide a wooden block across a table faster, yet friction doesn’t exist, what will happen to the wooden block?

• It will stop and not move at all.

• It will continuously move until something stops it.

• It will unendingly move anywhere and has the possibility of flying on its own.

Which of the following has the most kinetic energy?

• A man on the elevator

• A slow-moving bicycle

• A fast-moving train

What happens to the potential energy of a ball as it drops from a height?

• It increases as the ball falls

• It stays the same until it hits the ground

• It decreases and transforms into kinetic energy

If the Earth’s gravity suddenly became stronger, how would it affect people and objects?

• Everything would fly in the air.

• People and objects would become weightless.

• Objects would fall faster, and people would feel heavier.

A light bulb feels warm after being turned on for a while. What two forms of energy are being produced?

• Light energy and Heat energy

• Sound energy and Electrical energy

• Chemical energy and Mechanical energy

What causes the rock to fall to the ground faster than a feather when both are dropped at the same time?

• The rock has more gravity pulling it down.

• The feather has less mass than the rock.

• Air resistance slows the feather more than the rock.

My father is using a crowbar to lift a rock. How does the crowbar help?

• It changes the direction of force.

• It reduces the weight of the rock.

• It increases the force applied to the rock.

I kick a ball on a grassy field and then kicks another ball on a cement road, what can you infer about the difference in the ball's movement on each surface?

• The ball is heavier on the grass, therefore the ball will move farther.

• The cement has less friction than grass, therefore the ball will move farther.

• The grass has more gravity than cement, therefore the ball will move nearer.

What happens when two magnets with the same poles (e.g., north-north) are placed close to each other?

• They repel each other

• They attract each other

• They combine into one magnet