Types of Forces

What is a force?

• A type of energy that heats objects.

• A push or pull that causes objects to move, change direction, slow down, speed up, or stop.

• A material that objects are made of.

• A sound that objects make when they collide.

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What is a contact force?

• A force that acts without direct contact between objects.

• A force that acts upon the target once two objects come into direct contact.

• A force that acts only in outer space.

• A force that does not require any objects.

What is an at a distance force?

• A force that requires direct contact between objects.

• A force that works upon the target without two objects coming into direct contact.

• A force that only occurs underwater.

• A force that only affects living organisms.

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What is normal force?

• The force exerted by an object in motion

• The support force exerted upon an object in contact with a stable object

• The force that acts parallel to the surface

• The force that acts in the direction of gravity

In which direction does normal force act?

• Parallel to the surface

• At an angle to the surface

• Perpendicular to the surface

• Opposite to the direction of gravity

Where does normal force usually press on an object?

• From above

• From the side

• From below

• From the front

What is applied force?

• A force that acts at a distance without contact

• A force that is applied to an object by another object or person pushing or pulling it

• A force that opposes motion between two surfaces

• A force that acts in the opposite direction of gravity

What is the role of frictional force?

• It works in the same direction as the applied force.

• It works opposite to the applied force.

• It has no effect on the movement of objects.

• It only acts on objects in water.

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Why is it difficult to slide an object across a carpet?

• Because the carpet is smooth.

• Because there is no frictional force.

• Because the frictional force makes it difficult.

• Because the object is too light.

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Which surface makes it easiest to move an object?

• Carpet

• Concrete floor

• Ice

• Grass

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