Tag: renewable and non-renewable resources
Questions Related to renewable and non-renewable resources
A body rolling down a hill has
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K.E. only
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P.E. only
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Neither K.E. nor P.E
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Both (a) and (b)
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
A flying aeroplane has:
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only potential energy
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only kinetic energy
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both potential and kinetic energy
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none of these
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.
A body rolling down a hill has:
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K.E. only
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P.E. onley
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neither K.E. and P.E.
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both K.E and P.E
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.
Which of the following has both kinetic energy and potential energy ?
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A flying bird
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A bent bow about to shoot an arrow
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An athlete running at full speed
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None of the above
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
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thermal energy
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nuclear energy
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chemical energy
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mechanical energy
There are two different forms of mechanical energy,
Identify an example of kinetic mechanical energy?
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A loaded gun
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A set mouse trap
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An elevated wrecking ball
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A compressed spring
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A bike rolling down a hill
A loaded gun, a set mouse trap and a compressed spring are examples of elastic potential energy.
Which of the following type of wave is created by solar energy?
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mechanical
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electromagnetic
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terminal
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physical
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nuclear
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?
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Energy possessed by an object due to its location or motion
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Energy possessed by an object due to its temperature
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Energy possessed by an object due to its magnetic property
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Energy of an object due to its concentration
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Energy possessed by an object due to its age
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?
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$K=P+E$
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$E=P+K$
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$P=K+E$
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$E=PK$
Total mechanical energy of the system is equal to the sum of kinetic energy of the system and the potential energy of the system.
Total energy of body is the sum of:
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kinetic energies
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potential energies
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forces
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both A and B
Total energy of the body is the sum of potential energy and kinetic energy.