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?
tension
magnetism
friction
gravity
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What are the characteristics of drag?
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
it decreases as the object's speed increases
it is affected by the hardness of the fluid and the weight of the object
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What is terminal velocity?
the speed at which the driving force and the opposing drag force balance each other out
the maximum speed an object can reach
the speed at which an object starts to accelerate
the speed at which an object stops moving
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What happens when an object reaches terminal velocity?
the object decelerates
the object moves at a constant speed
the object stops moving
the object accelerates
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What are the forces acting on a skydiver?
air resistance and normal force
weight and air resistance
gravity and tension
tension and normal force
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What happens when a skydiver deploys their parachute?
terminal velocity decreases
air resistance increases
terminal velocity increases
air resistance decreases
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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 levels off
the point where the velocity begins to decrease
the point where the velocity reaches zero
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What happens to the drag force as the speed of an object increases?
it decreases
it becomes zero
it increases
it remains the same
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What influences the drag force?
the thickness of the fluid
all of the above
the object's speed
the shape and size of the object
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What force acts as the driving force for a skydiver?
air resistance
tension
friction
weight
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What happens to the net force and acceleration as a skydiver falls faster?
they increase
they decrease
they become zero
they remain the same
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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?
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Describe how a skydiver reaches terminal velocity and how deploying the parachute affects this.
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