Physics

The force of gravity on a person or object on the surface of a planet is called

• mass.

• weight.

• terminal velocity

• free fall.

What happens when two forces act in the same direction?

• They cancel each other out.

• The stronger one prevails.

• Their strengths are added.

• Their sum divided by two is the total force.

The force that one surface exerts on another when the two rub against each other is called

• friction.

• inertia.

• acceleration

• gravity

When the weight of an object is greater than the buoyant force, the object will ... 

• Sink
• Float 
• Expand
• Shrink

Buoyancy is the ability to

• Sink

• Float

Buoyant force acts in the ________________ of gravity, making things feel lighter

• same direction

• opposite direction

An object will float on water if it...

• is the same color as water

• has the same density as water

• is more dense than water

• is less dense than water

If an object is neutrally buoyant it will ________.

• sink

• float

• neither float or sink

• objects cannot be neutrally buoyant...

If an object is neutrally buoyant it will ________.

• sink

• float

• neither float or sink

• objects cannot be neutrally buoyant...

The weight of a stone is 20 N. When it is immersed in water, its weight is 15 N. What is the buoyant force acting on the stone?

• 2 N

• 3 N

• 4 N

• 5 N