When the force acts opposite to the direction of displacement
Work done is negative
Work done is positive
Work done is neutral
No work is done
The energy used in households, industries and commercial establishments are usually expressed in
Joules
W
KWh
None of these.
Which one of these physicists is from Britain?
Thomas Alva Edison
James Prescott Joule
C.V.Raman
None of these
A compressed spring possesses
Kinetic energy
Elastic potential energy
Electrical energy
Magnetic energy
Which of the following is the energy possessed by a body by virtue of its motion?
Potential energy
Mechanical energy
When we increase the speed of an object, it kinetic energy
Also increases
Decreases
Does not change
First increases then decreases
What is the velocity of body of mass 100 g having a K.E. of 20 J?
2 m s-1
20 m s-1
40 m s-1
400 m/s
Total energy of the universe remains
The same
Different
Constant
Variable
1 kilo watt =
10 watts
100 watts
500 watts
1000 watts
An object of mass 15 kg is moving with a uniform velocity of 4m s-1.What is the kinetic energy possessed by the object?
120 J
100 J
220 J
200 J
