Welcome to the Quiz!

This quiz contains 13 questions from a mix of 1 subtopics.

What is a force that opposes the movement between two surfaces in contact?

friction

tension

magnetism

gravity

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What are the characteristics of drag?

it is affected by the hardness of the fluid and the weight of the object

it decreases as the object's speed increases

it can cause an object to start moving or increase its speed

it increases as the object's speed increases and is affected by the thickness of the fluid and the shape and size of the object

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What is terminal velocity?

the speed at which an object stops moving

the maximum speed an object can reach

the speed at which the driving force and the opposing drag force balance each other out

the speed at which an object starts to accelerate

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What happens when an object reaches terminal velocity?

the object stops moving

the object moves at a constant speed

the object accelerates

the object decelerates

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What are the forces acting on a skydiver?

tension and normal force

air resistance and normal force

gravity and tension

weight and air resistance

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What happens when a skydiver deploys their parachute?

terminal velocity decreases

air resistance decreases

air resistance increases

terminal velocity increases

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2

What indicates the terminal velocity of a ball bearing in a liquid on a velocity-time graph?

the point where the velocity begins to increase

the point where the velocity reaches zero

the point where the velocity begins to decrease

the point where the velocity levels off

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What happens to the drag force as the speed of an object increases?

it increases

it becomes zero

it decreases

it remains the same

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What influences the drag force?

the thickness of the fluid

the shape and size of the object

the object's speed

all of the above

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What force acts as the driving force for a skydiver?

friction

air resistance

weight

tension

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What happens to the net force and acceleration as a skydiver falls faster?

they increase

they remain the same

they become zero

they decrease

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What is the term for the constant speed achieved when an object’s driving force and the opposing drag force balance each other out?

terminal Velocity

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Describe how a skydiver reaches terminal velocity and how deploying the parachute affects this.

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