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Recent questions tagged energy
+1
vote
1
answer
State whether the energy possed in the following is kinetic or potential.
asked
Apr 7, 2019
by
kratos
class-8
energy
its forms
+1
vote
1
answer
Two bodies, A and B, of equal mass are kept at heights 20m and 30m respectively.
asked
Apr 6, 2019
in
Class 10
by
kratos
work
energy
energy and power
class-10
icse
force
power
+2
votes
1
answer
State the energy changes in the following devices while in use: 1. A loud speaker.
asked
Apr 5, 2019
in
Class 11
by
kratos
work
energy
class-11
energy and power
class-10
icse
force
power
+3
votes
1
answer
What is meant by Work Done by a Constant Force ?
asked
Apr 4, 2019
in
Class 11
by
kratos
work
energy
class-11
power
+3
votes
1
answer
The work done by the force vector F = A(y^2i + 2x^2j), where A is a constant and x & y are in meters around the path shown is:
asked
Apr 4, 2019
in
JEE
by
kratos
work
energy
jee
vectors
class-11
jee mains
power
+2
votes
1
answer
The atmosphere becomes colder at higher elevation. As an average the standard atmospheric absolute temperature
asked
Apr 3, 2019
in
Mathematics
by
kratos
energy
thermodynamics
force
density
manometers
barometers
+3
votes
1
answer
A man lifts a mass of 20 kg to a height of 2.5 m. Assuming that the force of gravity on 1 kg mass is 10 N, find the work done by the man.
asked
Apr 2, 2019
in
Class 11
by
kratos
work
cbse
energy
class-11
class-9
class-10
icse
power
+2
votes
1
answer
An arrow is shot from a bow at an angle of 40 from the horizontal at a speed of 24.0 m/*.
asked
Apr 1, 2019
in
JEE
by
kratos
work
work energy and power
energy
jee
kinematics
energy and power
class-10
icse
force
power
jee mains
+3
votes
1
answer
State the energy changes that occur in a watch spring while it unwinds.
asked
Apr 1, 2019
in
Class 11
by
kratos
work
class-8
energy
class-11
class-7
icse
class-10
power
+1
vote
1
answer
A car of mass 2000 kg is lifted up a distance of 30 m by a crane in 1 min. A second crane does the same job in 2 min.
asked
Mar 31, 2019
in
Class 11
by
kratos
work
class-11
energy
energy and power
class-10
icse
power
+2
votes
1
answer
A car is going at a speed of 21.6 km/hr when it encounters a 12.8 m long slope of angle 30
asked
Mar 30, 2019
in
JEE
by
kratos
algebra
class-8
csat
class-11
energy
jee
time and distance
jee mains
friction
+1
vote
1
answer
Why is electrical power required at all when the elevator is descending? Why should there be a limit on the number of passengers in this case?
asked
Mar 30, 2019
in
Class 11
by
kratos
work
work energy and power
class-11
energy
energy and power
class-10
icse
power
+3
votes
1
answer
State the energy changes that take place in the following when they are in use : (1) a photovoltaic cell. (2) an electromagnet.
asked
Mar 28, 2019
in
Class 10
by
kratos
work
energy
class-10
icse
power
+3
votes
1
answer
Name the physical quantity measured in terms of horse power.
asked
Mar 26, 2019
in
Class 10
by
kratos
work
energy
class-10
icse
power
+3
votes
1
answer
State the energy changes in the following cases while in use:
asked
Mar 25, 2019
in
Class 10
by
kratos
work
work energy and power
energy
class-10
icse
power
+1
vote
1
answer
A man is supplying a constant power of 500 J/* to a massless string by pulling it at a constant speed of 10 m/*
asked
Mar 25, 2019
in
JEE
by
kratos
work
jee main 2020
energy
class-10
icse
power
+3
votes
1
answer
A 100 W light bulb burns on an average of 10 hours a day for one week. The weekly consumption of energy will be —— unit/*
asked
Mar 24, 2019
in
Class 11
by
kratos
work
energy
class-11
class-10
icse
power
+1
vote
1
answer
Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.
asked
Mar 24, 2019
in
Class 10
by
kratos
work
motion
newtons laws of motion
class-8
energy
energy and power
class-9
class-10
icse
force
power
+2
votes
1
answer
Name the form of energy which a body may possess even when it is not in motion. Give an example to support your answer.
asked
Mar 24, 2019
in
Class 10
by
kratos
class-8
work energy and power
energy
work and energy
class-9
class-10
icse
class-7
+2
votes
1
answer
State two factors on which the kinetic energy of a moving body depends.
asked
Mar 23, 2019
by
kratos
class-8
energy
class-7
icse
its forms
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