Science 8 Final ~ 2024

Your lunch box falls behind the refrigerator. You pull and pull on the refrigerator for 20 minutes, but you are unable to move it. It does not budge an inch! Pick that statement below that is true with regard to the scientific explanation of work.

• You are out of energy because of the work you did.
• You exerted a force and did work.
• You used potential energy to do work.
• The refrigerator did not move, so no work was done.

A net force greater than zero results in a

• change in motion
• Net Force

Which statement correctly explains the amount and direction of the net force acting on the rope, and in which direction the rope will move?

• The net force is 8 N to the left, and the rope will move to the right
• The net force is 8 N to the left, and the rope will move to the left.

The greater the force applied, the --- acceleration.

• greater
• lesser

You're driving in a car and suddenly come to a complete stop. Your body goes --- because of ---

• forward; gravity
• forward; friction
• forward; inertia
• backward; gravity
• backward; inertia

When an unbalanced force is applied to an object, the object will ---

• momentum
• accelerate
• decelerate
• react with an unbalanced, neutral force

22N left / 22N right =

• 22N unbalanced
• 0N balanced force (no change in motion)

What type of force is this?

• balanced
• unbalanced

An object at rest has equal forces acting on it. This can be described as a(n) ____________________ force.

• unbalanced
• balanced

Which of the following would have more inertia?

• bowling ball
• tennis ball
• ping pong ball
• feather