Which of the following is true when a body starts falling?
Its kinetic energy changes to potential energy
No change taken place
Energy becomes zero
Its potential energy changes to kinetic energy
Which of the following is the the ability to do work?
Energy
Velocity
Momentum
Force
Which one of these physicists is from Britain?
Thomas Alva Edison
James Prescott Joule
C.V.Raman
None of these
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
'Stone at a height'- which type of energy is related to this situation?
Kinetic energy
Potential energy
Mechanical energy
Electrical energy
Which of the following is due to position or state of strain?
When we increase the speed of an object, it kinetic energy
Also increases
Decreases
Does not change
First increases then decreases
Unit of power is
Watt
Joule
Newton
Pascal
At the start of a freely falling object its kinetic energy is zero. Why ?
Because its velocity is zero
Because mass has no effect at that height
The body is at a height
All the above
1 watt =
10 J S-1
1 J S-1
0.1 J S-1
100 J S-1
