Both kinetic energy and potential energy

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An electric heater is rated $1500 W$ . The energy used by it in $10$ hours is :

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Important Questions on Effect of Energy: Work, Power and Energy

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

1 kWh

equal to

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Heat and work done by the heat was discovered by

EASY

Physical Science>Physics>Effect of Energy: Work, Power 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?

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Physical Science>Physics>Effect of Energy: Work, Power 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}

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

A force of

40 N

acts on a body, and body moves through a distance of

2

metre at an angle of

45 °

in the direction of the force. The work done by the force is

EASY

Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

The work done to increase the velocity of a car from

30 km h^{- 1}

60 km h^{- 1}

, if the mass of the car is

1500 kg

, is:

EASY

Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be

HARD

Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

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.

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Physical Science>Physics>Effect of Energy: Work, Power 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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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Flying birds has

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

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

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

In any physical or chemical process, the total energy:

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Spring constant of a spring is

K = 6 \times 10^{3} N / m

. Work done to stretch it

10^{- 2} m

from mean position is

EASY

Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

A person of mass

100 kg

reaches a height in

10 seconds

. Find the power used by the person (

g = 10 \frac{m}{s^{2}}

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

The energy produced by converting one microgram of matter completely into energy will be

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Physical Science>Physics>Effect of Energy: Work, Power 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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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

Write in your words the definition of potential energy.

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :

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Physical Science>Physics>Effect of Energy: Work, Power and Energy>Energy

An object of mass

15 kg

is moving with uniform velocity of

4 m / s

. What is the kinetic energy possessed by the object?

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Physical Science>Physics>Effect of Energy: Work, Power 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.

An electric heater is rated 1500 W. The energy used by it in 10 hours is :

Important Questions on Effect of Energy: Work, Power and Energy

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An electric heater is rated $1500 W$ . The energy used by it in $10$ hours is :