Force, Gravity, Friction

Forces can act on an object even when it is not moving.

• true

• false

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

The gravitational force Earth exerts on you is equal to the gravitational force you exert on Earth.

• true

• false

Tags

NGSS.MS-PS2-4

Are object's near Earth's surface attracted towards Earth's surface or its center?

• surface

• center

Tags

NGSS.MS-PS2-2

Sean is moving heavy furniture by sliding it across the floor. He puts a blanket underneath the furniture. Why did this help him?

• The blanket protects the side of the furniture from bumping against the wall.

• The blanket reduces the gravitational force between the furniture and the floor.

• The friction is larger between the blanket and the floor than between the furniture and the floor.

• The friction is smaller between the blanket and the floor than between the furniture and the floor.

Planets A and B are both the same size, but planet B has three times the mass of planet A. How does the weight of an object compare on the two planets?

• The weight of an object is the same on both planets.

• The weight of an objects is three times larger on planet A.

• The weight of an object is three times larger on planet B.

• The weight of an object will depend on more factors than just the weight and size of the planet.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the direction of the net force when one force is pulling down and one force is pushing to the right?

• down

• right

• a combination of down and to the right

• the object doesn't move

The force of gravity acting on an object is the object's ______.

• Mass

• Matter

• Weight 

• Terminal velocity 

Which of the following will not change in different gravitational fields?

• weight

• force

• mass

• pounds

When does a falling object experienced balanced forces?

• When it reaches terminal velocity

• During free fall

• When it first starts to fall

• When it bounces up after hitting the ground

Tags

NGSS.MS-PS2-4

The main reason a baseball comes down when a boy tosses it up into the air is —

• magnetism is pulling the ball down

• the boy cannot see to catch it

• gravity is pulling down on the ball

• gravity pushes the ball in the air

Tags

NGSS.5-PS2-1