Force, motion, and simple machines

What is force?

• A push or a pull on an object

• A ball falling to the ground when dropped

• A change in motion or position of an object

A _____ is a force that pulls all objects on Earth down to the ground.

• Mass

• Energy

• Gravity

• Force

On Earth, a book is pushed off a table. What will happen to the book?

• It will fall back down to the ground.

• It will continue to float in the air.

• It will go upward.

• None of the above.

Which of the following masses has the weakest gravitational pull?

• Earth

• Sun

• Piano

• Penny

A soccer player kicks a ball down the field. What determines where the ball will land?

• The strength of the kick

• The strength and direction of the kick

• The directions of the kick

• Random chance

If Anna drops a rock on the playground, in which direction will it fall?

• Towards the ground

• Towards the center of the earth

• Downward

• All of the above

What is required to move an object?

• Gravity

• Force

• Push

• Pull

Balanced force makes objects change their motion.

• True

• False

Unbalanced forces do not make objects change its motion.

• True

• False

Is it an example of balanced or unbalanced force of a student sitting in a chair?

• Balanced

• Unbalanced