EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Work, Energy and Power>CG PET 2019>Q 3

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When work done by force of gravity is negative, then

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Important Questions on Work, Energy and Power

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Work, Energy and Power>CG PET 2019>Q 4

Power applied to a particle varies with time as

(P = 3 t^{2} - 2 t + 1) W,

where

t

is in second. The change in its kinetic energy between

t = 2 s

and

t = 4 s

is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Work, Energy and Power>CG PET 2017>Q 5

Which of the following graphs represent kinetic energy

(K),

potential energy

(U)

and height

(h)

from the ground for a freely falling body?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Work, Energy and Power>CG PET 2018>Q 6

Two springs of force constants $k_{1}$ and $k_{2}$ are stretched by the same force. The ratio of potential energies stored in them is

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR PHYSICS>Chapter 5 - Work, Energy and Power>CG PET 2019>Q 7

In the figure, mass of $A$ is $m$ and that of $B$ is $2 m$ . All the surface are smooth. System is released from rest with spring unstretched. Then, the maximum extension $X_{m}$ in spring will be

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