Q12 of 28 Page 159

When you push your bicycle up an incline, the potential energy of the bicycle and yourself increase. Where does this energy come from?

Pushing up a bicycle and moving up the incline is done by my muscle ,So my muscle loses energy some of the lost energy goes into the potential energy of bicycle and myself.


More from this chapter

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10

When an apple falls from a tree what happens to its gravitational potential energy just as it reaches the ground? After it strikes the ground?

 11

Let us assume that you have lifted a suitcase and kept it on a table. On which of the following does the work done by you depend or not depend? Why?

a) The path taken by the suitcase.


b) The time taken by you in doing so.


c) The weight of the suitcase.


d) Your weight.

 13

Why does a person standing for a long time get tired when he does not appear to be doing any work.

 14

What is kinetic energy? Derive an equation for the kinetic energy of a body of mass ‘m’ moving at a speed ‘v’.