different forms of energy

Question 1

define mechanical energy ?

Answer 1

Energy possessed by a body due to its state of motion or rest

Question 2

two forms of mechanical energy ?

Answer 2

potential and kinetic energy

Question 3

define potential ?

Answer 3

energy possessed by body at rest due to its position , size or state

Question 4

potential energy denoted by

Answer 4

U

Question 5

forms of potential energy ?

Answer 5

gravitational and elastic potential energy

Question 6

force of attraction due to earth is called -

Answer 6

gravitational potential energy

Question 6

force of attraction due to earth is called -

Answer 6

gravitational potential energy or weight of the body

Question 7

define gravitational potential energy ?

Answer 7

potential energy possessed by body due to force of attraction by earth

Question 8

when object is in infinite point Gravitational potential energy is

Answer 8

zero

Question 9

Gravitational potential energy of a body equal to

Answer 9

amount of work done by force of attraction

by earth in bringing the object from infinite point

Question 10

Gravitational potential energy of body is negative why?

Answer 10

work done by force of gravity itself , so at finite distance from earth Gravitational potential energy is negative

Question 11

as a distance of body from earth increases force of attraction __________

Answer 11

decreases

Question 12

force of attraction decreases

Gravitational potential energy __________.

Answer 12

increases

Question 13

define Elastic potential energy

Answer 13

when a external force is applied to a non rigid body it get deformed due to change in shape and size

Question 14

on removal of Elastic potential energy what will happen to the object ?

Answer 14

it regains its original form

Question 15

on removal of Elastic potential energy body regains it original form its due to

Answer 15

property of elasticity

Question 16

what will happen to the external force acted on the body

Answer 16

it gets stored in the body in form of Elastic potential energy

Question 16

potential energy possessed by a body in deformed state [ change in shape and size ]

Answer 16

Elastic potential energy

Question 16

amount of work done in deforming the body is -

Answer 16

Elastic potential energy

Question 16

gravitational potential energy is represented by -

Answer 16

U

Question 17

formula for Gravitational potential energy -

Answer 17

U=MGH

Question 18

gravitational potential energy measured as

Answer 18

amount of work done in lifting it up against force of gravity to that height

Question 19

when is at the height _____ stored in a body

Answer 19

gravitational potential energy

Question 20

height from the ground increases

potential energy _______

Answer 20

increases

Question 21

height from the ground decreases | potential energy _______

Answer 21

decreases

Question 22

gain in potential energy formula -

Answer 22

mg[h2-h1]

Question 23

loss in potential energy formula -

Answer 23

mg[ h1-h2]

Question 24

kinetic energy define -

Answer 24

energy possessed by body due to its state of motion

Question 25

kinetic energy denoted by

Answer 25

k

Question 26

kinetic energy possessed by a moving body is equal to amount of work __________

Answer 26

amount of work which a moving body can do before rest

Question 27

retarding force formula

Answer 27

f= m*a - a=retardation

Question 28

displacement formula - [in respect to velocity , retardation]

Answer 28

s = v^2 /2a

Question 29

average speed =

Answer 29

s/t

Question 30

v^2 =

Answer 30

v^2 = u^2 + 2aS

Question 31

kinetic energy formula -

Answer 31

k - 1/2 * mv^2

Question 32

on doubling the velocity of motion of the body - kinetic energy becomes _____

Answer 32

four times

Question 33

momentum = [ formula]

Answer 33

p = mv

Question 34

relationship btw momentum and kinetic energy - [ formula]

Answer 34

p^2 = 2mK , K = p^2 /2m

Question 35

WORK ENERGY THEOREM - [DEFINE ]

Answer 35

increase in kinetic energy = to work done by the force on moving body in direction of the body

Question 36

formula for displacement from this equation v^2=u^2 + 2aS

Answer 36

v^2 + u^2 / 2a = S

Question 37

according to work energy theorem - work done on the body is = _________

Answer 37

increase in kinetic energy

Question 38

Translational motion means

Answer 38

motion of the body in straight line

Question 39

translational kinetic energy -

Answer 39

kinetic energy of the body due to its motion in straight line

Question 40

molecule of monoatomic gas has _________ energy

Answer 40

translational kinetic energy

Question 41

rotational kinetic energy -

Answer 41

kinetic energy of the body due to its rotational motion

Question 42

atoms of moving diatomic possess _________ energies

Answer 42

translational , vibrational and rotational energies

Question 42

diatomic molecules rotate about _________

Answer 42

fixed axis

Question 43

vibrational kinetic energy -

Answer 43

kinetic energy of body due to vibrational motion

Question 44

rolling ball has ________ kinetic energies

Answer 44

rotational and translational

Question 45

potential energy changes only has

Answer 45

kinetic energy

Question 46

Nuclear energy -

Answer 46

energy possessed due to loss in mass during nuclear fission fusion .

Question 47

what is thermocouple ?

Answer 47

thermocouple changes heat energies into electrical energies | thermocouple is a two junction of two different metals kept at different temp

Question 48

dissipation of energies means

Answer 48

conversion of energies into undesirable form

Question 49

according to principle of conservation of energies -

Answer 49

energy can neither be created nor can be destroyed. It only changes from one form to another

Question 50

at ground level in an object potential energy will be

Answer 50

0