Tag: renewable and non-renewable resources

Questions Related to renewable and non-renewable resources

A body rolling down a hill has

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. K.E. only

  2. P.E. only

  3. Neither K.E. nor P.E

  4. Both (a) and (b)

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Correct Option: D
Explanation:

While rolling down from hill a body will have some Potential energy due to height wrt to ground and due to rolling it will have some Kinetic energy .As it will keep rolling down , Its PE will change into KE

So $E _{Total}=mgh+\dfrac{mv^2}{2}$

A flying aeroplane has:

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. only potential energy

  2. only kinetic energy

  3. both potential and kinetic energy

  4. none of these

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Correct Option: C
Explanation:

An flying aeroplane required some work to be done against gravity to go upto that much height that work will be stored as potential energy of the body. Also aeroplane has some mass and moving with some velocity so has some kinetic energy also. 

So this poses both potential as well as kinetic energy.

A body rolling down a hill has:

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. K.E. only

  2. P.E. onley

  3. neither K.E. and P.E.

  4. both K.E and P.E

Show answer
Correct Option: D
Explanation:

Taking toe of the hill as refrence point so some work against the gravity is done to raise the body to top of the hill so it poses some potential energy equal to mgh where m is mass and g is acceleration due to gravity and h is vertical height.

Also he is moving so he must have some kinetic energy.
So body rolling along the hill have both kinetic as well as potential energy.

Which of the following has both kinetic energy and potential energy ?

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. A flying bird

  2. A bent bow about to shoot an arrow

  3. An athlete running at full speed

  4. None of the above

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Correct Option: A
Explanation:

Since the bird is flying is must be at some distance from the ground and Potential energy is present when there is some height associated with that object (Since P.E = mgh). Also  the bird has mass and thus gravity will be acted on it. Kinetic energy is present for an object if it has velocity.This a flying bird has both kinetic energy and potential energy.

Kinetic energy and potential energy are the two forms of

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. thermal energy

  2. nuclear energy

  3. chemical energy

  4. mechanical energy

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Correct Option: D
Explanation:

There are two different forms of mechanical energy,

i.e. kinetic energy and potential energy.

Identify an example of kinetic mechanical energy?

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. A loaded gun

  2. A set mouse trap

  3. An elevated wrecking ball

  4. A compressed spring

  5. A bike rolling down a hill

Show answer
Correct Option: E
Explanation:

A loaded gun, a set mouse trap and a compressed spring are examples of elastic potential energy.

An elevated wrecking ball is an example of gravitational potential energy.
A bike rolling down a hill is an example of kinetic energy, where potential energy is constantly converting in the kinetic energy of the bike as given by $\dfrac{1}{2}mv^2$.

Which of the following type of wave is created by solar energy?

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. mechanical

  2. electromagnetic

  3. terminal

  4. physical

  5. nuclear

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Correct Option: B
Explanation:

Sun gives out light, which is an electromagnetic wave. Several nuclear reactions take place in Sun's core and thus light is produced.

Select the best definition of mechanical energy?

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. Energy possessed by an object due to its location or motion

  2. Energy possessed by an object due to its temperature

  3. Energy possessed by an object due to its magnetic property

  4. Energy of an object due to its concentration

  5. Energy possessed by an object due to its age

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Correct Option: A
Explanation:

Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy(energy of motion) or potential energy (stored energy of position). 

What is the relationship between the kinetic energy($K$), potential energy($P$) and total energy($E$) of a system?

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. $K=P+E$

  2. $E=P+K$

  3. $P=K+E$

  4. $E=PK$

Show answer
Correct Option: B
Explanation:

Total mechanical energy of the system is equal to the sum of kinetic energy of the system and the potential energy of the system.

Thus, total mechanical energy  $E = K+P$

Total energy of body is the sum of:

physics types of energy renewable and non-renewable resources renewable and non-renewable sources of energy substances, objects and energy

  1. kinetic energies

  2. potential energies

  3. forces

  4. both A and B

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Correct Option: D
Explanation:

Total energy of the body is the sum of potential energy and kinetic energy.


Hence correct answer is option $D $