Earth's Forces & Energy, Work, and Power

A force of attraction between 2 objects, that is directly related to mass and distance.

• mass

• weight

• gravity

• kilogram

What force causes objects falling near Earth's surface to slow down?

• Gravity
• Air Resistance
• Centripetal Force
• Newtons

Tags

NGSS.MS-PS3-5

What two things determine the gravity of an object?

• mass & weight

• mass & distance

• density & mass

• volume & distance

Tags

NGSS.MS-PS2-4

As distance between two objects increases, the force of gravity

• Increases

• Decreases

• Stays the same

Gravity attracts all objects towards one another.

• False

• True

How does friction affect an object's speed?

• more friction decreases speed

• more friction increases speed

• less friction decreases speed

Rougher surfaces have ...

• greater friction
• less friction
• the same level of friction

Which of the following statements is false?

• Friction can only slow things down

• Friction is never useful

• Friction can stop things from moving

How would the absence of friction affect a marble traveling on a long, straight path?

• The marble’s speed would decrease.
• The marble’s speed would increase.
• The marble would stop immediately. 
• The marble would remain at constant speed.

Tags

NGSS.MS-PS2-2

Where is the force of attraction the strongest on a magnet?

• at the poles
• in the middle
• above the magnet
• below the magnet

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5