Both kinetic energy and potential energy

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What is potential energy? An ideal spring having spring constant $k$ is compressed by $x$ distance. Derive the formula of acquired potential energy of the spring.

Important Questions on Work and Energy

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List any three differences between nuclear fission reaction and nuclear fusion reaction.

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Explain how is nuclear energy generated in power reactors. How is electricity produced from nuclear energy?

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Science>Physics>Work and Energy>Energy

Write any four differences between nuclear fusion and nuclear fission.

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An object of mass

15 kg

is moving with uniform velocity of

4 m / s

. What is the kinetic energy possessed by the object?

HARD

Science>Physics>Work and Energy>Energy

A block of

9 kg

is moving with a velocity of

4 m / s

on a frictionless surface. The block comes to rest by compressing the spring. If the spring constant is

4 x 10^{4} N / kg

, then find the compression in the spring.

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Write a short note on: Nuclear Energy

EASY

Science>Physics>Work and Energy>Energy

Uranium is used to obtain:

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Which of the following graphs shows correct relation of kinetic energy (E), potential Energy (U) and height (h) from the ground of a particle?

EASY

Science>Physics>Work and Energy>Energy

A rod of length

l

and mass

m

fixed at one end, is hanging vertically. The other end is now raised so that the rod makes an angle

30 °

with horizontal line. The work done in the process will be :

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Science>Physics>Work and Energy>Energy

Flying birds has

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Science>Physics>Work and Energy>Energy

Which one of the following is an example of Biomass energy source.

HARD

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A spring of spring constant $K = 4 x 10^{3} N / m$ is compressed by $2 cm$ , then determine the potential energy stored in spring.

EASY

Science>Physics>Work and Energy>Energy

Which of the following graphs best represent the graphical relationship between Kinetic Energy

(K . E)

and momentum

(P)

of a body in motion?

EASY

Science>Physics>Work and Energy>Energy

Write the name of two elements used as nuclear energy.

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Science>Physics>Work and Energy>Energy

How fast should a man weighing

600 N

run to achieve a kinetic energy of

750 J

. Take

g = 10 m s^{- 2}

EASY

Science>Physics>Work and Energy>Energy

In any physical or chemical process, the total energy:

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Science>Physics>Work and Energy>Energy

Define a kilowatt-hour. How is it related to joule?

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Science>Physics>Work and Energy>Energy

Ratio of potential energies of body A and body B will be

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Science>Physics>Work and Energy>Energy

Write in your words the definition of potential energy.

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Science>Physics>Work and Energy>Energy

Two bodies A and B have masses in the ratio

5 : 1

and their kinetic energies are in the ratio

125 : 9

. Find the ratio of their velocities.

What is potential energy? An ideal spring having spring constant k is compressed by x distance. Derive the formula of acquired potential energy of the spring.

Important Questions on Work and Energy

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What is potential energy? An ideal spring having spring constant $k$ is compressed by $x$ distance. Derive the formula of acquired potential energy of the spring.