Study Jams Gravity and Inertia

Which of these can cause a moving object to change direction?

• inertia
• velocity
• force
• mass

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-5

What is gravitational force?

• the force that keeps people from moving
• the force of attraction between any two objects
• the force that makes inert objects start moving
• the only force that changes an object's velocity

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Where is an object's center of gravity?

• the exact center of its mass
• the part that is closest to Earth
• any part of an object, as long as it has a mass
• all of the above

A paperclip and a computer are sitting on your desk. What is true about the gravitational force of these two objects?

• The paperclip attracts the computer with less gravitational force than the computer attracts the paperclip.
• The computer and the paperclip attract each other with equal gravitational force.
• The computer attracts the paperclip with less gravitational force than the paperclip attracts the computer.
• There is no gravitational force between the paperclip and the computer.

Tags

NGSS.MS-PS2-4

Why don't we see the ground coming toward us?

• We have less gravitational force than the earth.
• We have more inertia than the earth.
• We have less mass than the earth.
• We are already standing on the earth.

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

Why doesn't the moon crash towards Earth's surface?

• It has very little inertia, so it stays in the sky and floats through space.
• It has a lot of mass, so it feels the earth's gravitational force less than smaller objects do.
• It has more mass than the earth, so it stays in one place while the earth orbits it.
• It is too small to fall through the earth's atmosphere and reach the earth's surface.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Why is it impossible to "defy gravity?"

• There is no gravity.
• You can't defy gravity without going to another planet.
• Gravitational force exists every place where there are two objects.
• Nothing has enough force to resist gravity.

Tags

NGSS.MS-PS2-4