CBA REVIEW: Forces

What are balanced forces?

• Forces that are equal in size and opposite in direction, causing no change in motion.

• Forces that are unequal in size and in the same direction, causing motion.

• Forces that are equal in size and in the same direction, causing motion.

• Forces that are unequal in size and opposite in direction, causing no change in motion.

What is the net force when forces are balanced?

• Greater than zero

• Less than zero

• Zero

• Equal to the gravitational force

What effect do balanced forces have on motion?

• They cause an increase in speed.

• They cause a decrease in speed.

• They cause a change in direction.

• They do not cause a change in motion.

Two forces acting on an object are modeled in the diagram.

Which best describes the forces modeled by the diagram?

• The forces are unbalanced; the net force is 10 N upward.

• The forces are unbalanced; the net force is 7 N upward.

• The forces are balanced; the net force is 10 N downward.

• The forces are balanced; the net force is 7 N upward.

Tags

NGSS.MS-PS2-2

What happens when forces act in the same direction?

• They cancel each other out

• They add up

• They subtract from each other

• They have no effect

Tags

NGSS.MS-PS2-2

What is the result when forces act in opposite directions?

• You add the forces together

• You subtract the smaller force from the larger one

• The forces cancel each other out

• The object moves in the direction of the smaller force

Tags

NGSS.HS-PS2-1

Which of the following is the best example of friction?

• A vase of flowers sitting on a table.

• A bike tire being squeezed by a brake.

• An apple falling to the ground from a tree.

• A bowling ball rolling down the lane at a constant speed.

What is Newton's Third Law of Motion?

• For every action there is an equal and opposite reaction.

• An object in motion stays in motion.

• Force equals mass times acceleration.

• Energy cannot be created or destroyed.

Tags

NGSS.MS-PS2-1

What is a force?

• A type of energy.

• A push or a pull that acts upon an object.

• A measure of mass.

• A unit of distance.

Tags

NGSS.MS-PS2-1

What is an action?

• Something that happens in response to a reaction.

• A force that acts upon an object.

• Something done or performed.

• A type of energy.

Tags

NGSS.MS-PS2-1