Practice Work, Energy, And Power (A.3) - Theme A: Space, Time, and Motion

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10 questions

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4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
Define work in a physics context.
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Think about what happens when a force moves an object.
Question 2.
What is the formula for kinetic energy?
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Remember what 'm' and 'v' represent.
3Question 3.
What is the formula for work?
- W = F·s cos θ
- W = F + s
- W = 1/2 mv^2
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Work involves force and displacement.
4Question 4.
Is gravitational potential energy dependent on height?
- True
- False
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Think of energy related to vertical position.
Question 5.
A 5 kg object is lifted 2 meters high. Calculate its gravitational potential energy.
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Think about height and mass.
Question 6.
A car with a mass of 1000 kg accelerates from 0 to 20 m/s. Calculate the change in kinetic energy.
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Use the kinetic energy formula before and after acceleration.

6 more questions in this section. Enroll free to practise them all.