Q1 of 13 Page 128

Which object with the mass indicated has a higher potential energy?

As we know,


potential energy(u) = mgh


(a) u = 980J


(b) u = 988J


(c) u = 7840J


(d) u = 1176J


So, the object with mass 8kg possesses maximum potential energy.

More from this chapter

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1

The correct formula to find the velocity v of a body with kinetic energy ‘k’ is

 1

The correct sequence of energy changes in hydroelectric power station is,

 2

Fill in the blanks with suitable words

1. Unit of power is _________ .


2. Unit of energy is _________ .


3. If a candle is burnt, the chemical energy is transformed into __________ .


4. The water stored in an overhead tank possesses _________ energy.


5. In a cinema theatre electrical energy is transformed into ________and__________ energy.

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Answer the following

State whether the energy possessed in the following is kinetic or potential;


Compressed spring, stretched bow, moving arrow, water stored in a dam, a stone at the top of a building, bird resting on the branch of a tree.