unit 3 (2020)

Acceleration occurs when an object

• speeds up

• slows down

• changes direction

• all of the above

Inertia is 

• mass x acceleration
• distance/time
• the tendency of an object to resist change in motion
• an equal and opposite reaction

two or more forces act upon an object in such a way as to exactly counteract each other

• friction
• balanced force
• unbalanced force
• force

a force that causes a change in motion of an object

• friction
• balanced force
• unbalanced force
• force

Tags

NGSS.3-PS2-1

a push or a pull acting upon an object

• force
• motion
• energy
• friction

the speed and direction in which it moves

• weight
• velocity
• speed
• energy

An object at rest will remain at rest or in the same uniform motion unless acted upon by an unbalanced force: law of inertia.

• Newton's First Law of Motion
• Newton's Second Law of Motion
• Newton's Third Law of Motion

Speed is different from velocity because

• Velocity has a direction
• Speed uses Distance /Time
• Velocity doesn't include time
• Velocity doesn't include distance

Roller coasters use potential and kinetic energy to move carts around the track. Which selection below organizes the points of potential energy from GREATEST to LEAST?

• 6,4,1
• 1,4,6
• 2,3,5
• 5,3,2

Potential energy refers to objects that have ________________________ .

• changing chemically
• stored energy
• in motion
• changing electrically