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