Gravitation, Force and Mass

Gravitational Force

All Objects Have Gravitational Force

Multiple Choice

Only large objects like planets have gravitational force?

• True

• False

What is gravitational force?

• Force of attraction (pull) between two objects

• When objects attract, the pull with the same gravitational force

Multiple Choice

When two objects pull toward each other, we call it the force of

• attraction

• balanced

• friction

• unbalanced

Multiple Choice

A basketball and the earth pull on each other with the same amount of gravitational force.

• True

• False

Where does gravitational force come from?

• The center of an object's mass (its exact center)

• 
  

Multiple Choice

Gravitational force of an object comes from it's

• area closest to other objects

• area farthest from other objects

• center

• none of these

What are the two factors that affect the strength of the force of gravity?

• Mass: objects with less mass feel the pull of gravity more, causing the object with less mass to pull toward the object with more mass

• Example: Ball falls to the earth

Multiple Choice

Objects with more mass will move toward an object with less mass.

• True

• False

What are the two factors that affect the strength of the force of gravity?

• Distance: Objects that are closer together have a stronger gravitational force toward each other

• Example: Earth and its Moon

Multiple Choice

The closer two objects are, the less gravitational pull they will have toward each other.

• True

• False

How does gravitational force affect motion?

• Speed: as objects fall, the move faster (each second Earth's gravity causes an object's speed to increase by about 10 meters per second)

• 
  

Multiple Choice

As an object falls, its speed will stay the same during the entire fall.

• True

• False

Multiple Choice

For every second an object falls due to gravity, it will increase its speed by

• 2 meters per second

• 5 meters per second

• 10 meters per second

• 100 meters per second

How does gravitational force affect motion?

• Direction: objects thrown in a straight line will start to curve downward

• 
  

Multiple Choice

The direction an object moves is not affected by gravity.

• True

• False

Multiple Choice

How could you describe the direction an object travels when gravity pulls on it?

• straight line

• balanced

• curved

• distance

Gravitational Force and Orbits

• Motion of Satellite + Pull of Gravity = Curved Path

• Without gravity, the satellite would travel away from the center and off into space