8th Grade Science - Work, Force, and Motion Review

What is the rate at which an object changes its velocity?

• Speed

• Force

• Work

• Acceleration

What is a push or a pull that causes an object to move, stop, or change direction?

• Speed

• Work

• Power

• Force

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Which of the following is an example of a simple machine?

• Bicycle

• Engine

• Pulley

What is defined as the distance an object moves per unit of time?

• Velocity

• Power

• Acceleration

• Speed

Tags

NGSS.MS-PS3-1

How is velocity different from speed?

• Velocity is measured in different units

• Speed is measured in Newtons

• Speed is always greater than velocity

• Velocity includes direction

What is the term for the product of force and the distance over which it is applied?

• Acceleration

• Speed

• Power

• Work

What is the SI unit of force?

• Joule

• Kilogram

• Watt

• Newton

Which of Newton's laws states that an object in motion stays in motion unless acted on by an external force?

• Third Law

• Second Law

• Law of Universal Gravitation

• First Law

If two people push on a box with equal force in opposite directions, what will happen to the box?

• It will move in the direction of the stronger force

• It will accelerate in both directions

• It will move at a constant speed

• It will remain stationary

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1

Which simple machine consists of a bar that pivots on a fulcrum?

• Pulley

• Wedge

• Inclined plane

• Lever