3rd 9 Weeks Exam-Science 2025

Which type of simple machine is used to hold two objects together?

• a. lever

• b. wedge

• c. pulley

• d. screw

When two equal forces act in opposite directions on an object, they are called.

• Friction forces
• Balanced forces
• Centripetal forces
• Gravitational forces

When an unbalanced force acts on an object, the force

• Changes the motion of the object
• Is canceled by another force
• Does not change the motion of the object
• Equal to the weight of the object

The resistance of an object to any change in its motion is called

• Inertia
• Friction
• Gravity
• Weight

A door stop is an example of a

• Wedge
• Screw
• Lever
• Inclined Plane

According to Newton’s second law of motion, force is equal to mass times

• Inertia
• Weight
• Direction
• Acceleration

Inertia is Newton’s law that says an object will

• Stay at rest or stay in motion
• Resist all forces
• Overpower all forces
• Roll in space forever

A push or pull is called a

• Motion
• Newton’s Law
• Force
• Constant speed

What is potential energy

• The stored energy of an object due to its position or condition
• The energy that an object has due to its motion
• The energy of an object has due to its speed
• The energy an object has due to its volume

In a second class lever, the ________ is in the middle.

• Effort
• Load
• Fulcrum
• Machine