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Worksheets7. Work, Energy, Power
Total questions: 15
Worksheet time: 16mins
A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is done?
50J
50W
500J
500W
Which type of energy is stored in a stretched bow and arrow?
kinetic energy
potential energy
A girl weighs 400 N. She runs up a flight of stairs of height 5 m in 4 seconds. Her power is:
320 W
400 W
500 W
2 000 W
Which formula is this?
? = 21mv2
Potential Energy
Kinetic Energy
Mechanical Energy
Work
The SI Unit for Energy is
Joule
Newton
Calorie
Watt
What kind of energy is in a moving skateboard?
Potential
Kinetic
What is happening to the potential energy between position 1 to 3?
Decreasing
Increasing
Stays the same
The Principle of Conservation of Energy states that energy cannot be ________ or ________, but it can change from one form to another.
created, destroyed
gravity, force
heat, created
Gravitational potential energy = mgh
An eagle with a mass of 2 kg is flying at a height of 200 m. What is its gravitational potential energy? (Use g = 10 N/kg)
40 J
400 J
4000 J
40000 J
A spring is stretched as shown in the diagram below.
What is the elastic potential energy possessed by the spring when it is stretched?
3 J
6 J
300 J
600 J
