Work and Energy

A force is acting on a body, but it causes no displacement. The work done on the body is:

 
 
 
 

A practical engine cannot have an efficiency equal to or greater than:

 
 
 
 

The SI unit of power is:

 
 
 
 

A ball is thrown downward with an initial velocity, its:

 
 
 
 

One unit of horsepower is equivalent to:

 
 
 
 

A car, an elephant, and a cricket ball have the same kinetic energy. Which of these will have a greater speed?

 
 
 
 

A box is taken to the second floor of a building by doing some work. This work converts to:

 
 
 
 

The type of energy derived from heated groundwater is:

 
 
 
 

The unit of work or energy joule (J) is equal to:

 
 
 
 

A 4 kg body is thrown vertically upward from the ground with a velocity of 5 m/s. If friction is neglected, its kinetic energy just before hitting the ground is:

 
 
 
 

A ball weighing 50 N is lifted to a height of 5 meters. The potential energy stored in it is:

 
 
 
 

Which one is a renewable energy source?

 
 
 
 

A weightlifter of power 1960 W lifts a load of mass ‘M’ from the ground to a height of 2 m in 3 seconds. ‘M’ is:

 
 
 
 

A heavy and a lighter object have the same momenta. The object with greater kinetic energy is:

 
 
 
 

What is the power utilized when 100 J of work is done in 5s?

 
 
 
 

Question 1 of 15

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  10. Briefly discuss the importance of physics in other disciplines of science.
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  12. Explain the terms hypothesis, theory, and law with examples.
  13. Define the scientific method and list its key steps.
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