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Senior High School: 11th and 12th Grade
Physics
Forces - Forces And Terminal Velocity
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Q.1
What could a horizontal line on a velocity-time graph indicate?
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An object has reached terminal velocity
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An object is accelerating
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An object is decelerating
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An object has changed direction
Q.2
The gravity on the moon is 1/6 of the force due to gravity on the Earth. What is the weight of a person on the moon who has a mass of 65 kg?
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6.5 N
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25 N
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65 N
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108 N
Q.3
What is the speed of an object known as when the force due to gravity and the frictional forces acting on the object are equal?
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Initial velocity
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Terminal velocity
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Final velocity
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Light speed
Q.4
If an object is placed into a fluid and released on Earth, what will initially happen to the object?
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Accelerate
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Decelerate
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Move at a constant velocity
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None of the above
Q.5
Which statement is true for an object which is traveling through a fluid?
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The slower an object moves, the greater the frictional force that acts upon it
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The frictional force on an object moving through a fluid remains constant regardless of the speed at which the object moves through the fluid
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The faster an object moves, the greater the frictional force that acts upon it
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After an object reaches a certain speed, whilst traveling through a liquid, the frictional force acting upon it becomes zero
Q.6
An astronaut travels to another planet. On this planet she records that she has a weight of 400 N. She knows from measurements back at the space center that she has a mass of 72 kg. What is the strength of gravity on this new planet?
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3.3 N/kg
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5.56 N/kg
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7.89 N/kg
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12.23 N/kg
Q.7
Why does a parachute reduce a parachutist's terminal velocity?
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It decreases the force of gravity exerted on the parachutist and hence reduces the parachutist's terminal velocity
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It decreases the amount of air resistance exerted on the parachutist and hence reduces the parachutist's terminal velocity
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It increases the amount of air resistance exerted on the parachutist and hence reduces the parachutist's terminal velocity
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It increases the force of gravity exerted on the parachutist and hence reduces the parachutist's terminal velocity
Q.8
What is weight measured in?
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Kilograms
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Newtons
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Grams
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Metres
Q.9
What is the weight of a person on Earth if their mass is 65 kg?
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500 N
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650 N
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750 N
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850 N
Q.10
Which formula correctly relates the weight of an object and the force exerted on it by gravity?
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W = 2 x m x g
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W = m x g
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W = 2g
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G = W x m
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