L3 Applied Forces & L4 Friction and Air Resistance

What is an applied force?

• A force that opposes motion

• A force applied by a person or object onto another object

• A force that acts at a distance

• A force that only exists in liquids

Which of the following is an example of a push?

• Pulling a rope

• Kicking a ball

• Lifting a book

• Holding a cup

What does friction do to a moving object?

• Speeds it up

• Stops it immediately

• Slows it down

• Changes its color

What is the effect of a smooth surface on friction?

• Increases friction

• Decreases friction

• Has no effect on friction

• Changes the direction of friction

What is air resistance also known as?

• Air friction

• Air pressure

• Air flow

• Air density

Which of the following does NOT affect air resistance?

• Speed of the object

• Shape of the object

• Mass of the object

• Orientation of the object

What happens to air resistance when an object moves faster?

• It decreases

• It stays the same

• It increases

• It disappears

Why are parachutes large?

• To reduce weight

• To capture more air resistance

• To look colorful

• To increase speed

What is the main purpose of oil in a car engine?

• To make the engine heavier

• To decrease friction between parts

• To increase the engine's temperature

• To change the engine's color

What type of force is friction?

• A force that attracts objects

• A force that opposes motion

• A force that speeds up objects

• A force that changes the shape of objects