StudentAidUnit 5: Work, Energy and Power — Mcqs
9th Class Physics · Unit 5: Work, Energy and Power
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Multiple Choice Questions (Exercise)
1.Work done is maximum when the angle between the force F and the displacement d is:
2.A joule can also be written as:
3.The SI unit of power is:
4.The power of a water pump is 2 kW. The amount of water it can raise in one minute to a height of 5 meter is:
5.A bullet of mas 0.05 kg has a speed of 300 ms^-1. Its kinetic energy will be:
6.If a car doubles its speed, its kinetic energy will be:
7.The energy possessed by a body by virtue of its position is:
8.The magnitude of momentum of an object is doubled, the kinetic energy of the object will:
9.Which of the following is not renewable energy source?
SLO based Additional MCQs
Work
1.The unit of work or energy joule (J) is equal to __________.
Kinetic Energy
2.A car, an elephant and a cricket ball have same kinetic energies. Which of these have greater speed?
3.A heavy and a lighter object have same momentum. The object with greater kinetic energy is:
Potential Energy
4.A ball weighing 50 N is lifted to a height of 5 metre. The potential energy stored in it is:
- a 250 J
- b 25 J
- c 45 J
- d 55 J
5.A weight lifter of power 1960 watt lifts a load of mass 'M' from the ground to a height of 2m in 3 second. 'M' is:
Power
6.What is the power utilized when 100 J of work is done in 5 s:
7.The SI unit of power:
8.One unit of horsepower is equivalent to:
Law of Conservation of Energy
9.A 4 kg body is thrown vertically upward from the ground with a velocity of 5 ms^-1. If friction is neglected its kinetic energy just before hitting the ground is:
10.A ball is thrown downward with an initial velocity, its:
11.A box is taken to the second floor of a building by doing some work. This work converts to:
Geothermal Energy
12.The type of energy derived from heated ground water is:
Renewable Source of Energy
13.Which one is renewable source of:
Efficiency
14.A practical engine cannot have an efficiency equal to:
Cases of Work
15.A force is acting on body but causes no displacement. The work done on the body is: