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GCSE
Gcse Physics
Forces - Kinetic Energy Of Objects
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Q.1
What is the formula for kinetic energy?
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K.E = m x v
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K.E = 1/2 m x v2
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K.E = m x v2
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K.E = v x m2
Q.2
An athlete has a mass of 70 kg and is running at a speed of 10 m/s. What is their kinetic energy?
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3500 J
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7000 J
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350 J
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700 J
Q.3
What is the mass of a ball which has 2.5 J of energy and is travelling at 5 m/s?
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0.1 kg
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0.2 kg
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12.5 kg
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62.5 kg
Q.4
Which formula correctly shows the relationship between speed and acceleration?
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a = (v - u)/t
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a = (u - v)/t
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a = (v - t)/u
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a = v x u x t
Q.5
What is the acceleration of a car as it increases in speed from 3 m/s to 10 m/s in a period of 5 seconds?
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1.7 m/s2
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1.4 m/s2
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2 m/s2
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0.6 m/s2
Q.6
What is the mass of a person who accelerates from 0 m/s to 10 m/s in 30 seconds? When travelling at 10 m/s, the person has a kinetic energy of 5000 J.
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50 kg
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68 kg
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86 kg
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100 kg
Q.7
Which of the following can be converted into kinetic energy?
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Gravitational potential energy
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Elastic energy
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Chemical energy
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All of the above
Q.8
A ball is dropped from a height of 10 m and is pulled towards the Earth due to the gravitational field of the Earth. The strength of the Earth's gravitational field is 10 N/kg. What is the mass of the ball, if the ball has 100 J of GPE?
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0.5 kg
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1 kg
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1.5 kg
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1.8 kg
Q.9
What is the weight of the ball in the question above?
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1 N
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9.81 N
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10 N
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15 N
Q.10
What is the speed of a bird of mass 3 kg which has kinetic energy of 400 J?
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10 m/s
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16 m/s
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17 m/s
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20 m/s
0 h : 0 m : 1 s
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