Force Friction Gravity

Two basketballs are sitting 1m apart and are not moving. Which best explains why the gravitational force does not cause them to move?

• No gravitational force exists between the two objects because they are not touching.

• The gravitational force between the two objects is weak because they are 1m apart.

• No gravitational force exists between the two objects because their masses are small.

• The gravitational force between the two objects is weak because their masses are small.

Tags

NGSS.MS-PS2-2

In which situation is it better to have low friction?

• a skydiver uses a parachute

• a student walks down a hallway

• a ladder leans against a wall

• a hockey puck slides toward the goal

a force of attraction between objects that is due to their masses and that decreases as the distance between the objects increases

• gravity

• friction

• weight

• air resistance

Tags

NGSS.MS-PS2-4

a force that opposes motion between two surfaces that are in contact

• gravity

• weight

• friction

• air resistance

How should you calculate the net force of two forces in the same direction?

• only count the smaller force

• subtract the smaller force from the larger force

• only count the larger force

• add the forces together

Tags

NGSS.MS-PS2-2

What happens to an object when opposite forces are exactly equal?

• the object doesn't move

• the object moves up

• the object moves right

• this cannot happen

Tags

NGSS.MS-PS2-2

a parachutist falling to the ground

• balanced

• unbalanced

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Two factors effecting the magnitude of the force of gravity between 2 objects are...

• Mass and Distance 

• Mass and Matter

• Distance and Weight 

• Weight and Mass

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

What is the force acting between any two objects in the known universe all the time?

• Gravitational Force 

• Force of Friction 

• Normal Force 

• Electromagnetic Force 

Tags

NGSS.MS-PS2-4

What type of fluid friction acts on an object moving through the air?

• Friction 

• Normal Force 

• Gravity 

• Air resistance