Work, energy, and power (AQA A-Level Physics): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is work done defined as?
What is work done defined as?
Force × distance in force direction
In , what does represent?
In , what does represent?
Angle between force and motion direction
A force of 20 N at 60° moves an object 3 m. What is the work done?
A force of 20 N at 60° moves an object 3 m. What is the work done?
30 J
What is power defined as?
What is power defined as?
Rate of work done or energy transfer
A machine does 300 J of work in 6 seconds. What is the power output?
A machine does 300 J of work in 6 seconds. What is the power output?
50 W
Which formula represents power when force and motion are in the same direction?
Which formula represents power when force and motion are in the same direction?
How is work done found when force varies over distance?
How is work done found when force varies over distance?
Area under force-displacement graph
What does efficiency measure?
What does efficiency measure?
How well input converts to useful output
A motor has 200 W input and 150 W useful output. What is its efficiency?
A motor has 200 W input and 150 W useful output. What is its efficiency?
75%
What are the SI units for work done?
What are the SI units for work done?
Joules (J)