Force and Motion

What is friction?

• Force that opposes motion

• Force that attracts objects

• Force that causes motion

• Force that increases speed

Which of the following is an example of friction?

• Rubbing your hands together

• Blowing air on a piece of paper.

• Walking on a slippery surface.

• Pouring water into a glass.

What is gravity?

• Gravity is a force that only exists on Earth.

• Gravity is a force that repels objects away from each other.

• Gravity is a force that attracts objects towards each other.

• Gravity is a force that only affects large objects.

Which of the following is an example of gravity?

• The force that pulls objects towards each other

• The force that creates sound waves.

• The force that causes objects to float in water.

• The force that pushes objects away from each other.

What is acceleration?

• Change in position over time

• Rate of change of speed

• Rate of change of distance

• Rate of change of velocity

Which of the following is an example of acceleration?

• A car slowing down at a red light.

• A person walking at a constant speed.

• A bicycle coasting downhill.

• A car speeding up from a stop sign.

Friction can make objects:

• slow down or stop

• speed up

• change color

• float in the air

Gravity keeps us:

• suspended

• grounded

• uplifted

• floating

Acceleration can make an object:

• change color

• increase in size

• stop completely

• move faster, slow down, or change direction

Which force helps us walk on the ground?

• friction

• inertia

• magnetism

• gravity