Question
Physics Question on work, energy and power
In which case the potential energy decrease on
A
compressing the spring
B
stretching a spring
C
moving a body against gravitational pull
D
raising of an air bubble in water.
Answer
raising of an air bubble in water.
Explanation
Solution
P.E. increases in choices 1, 2 and 3. The upthrust makes the air bubble rise in the water so there is decrease in energy.