A body of mass 5 kg is taken from a height 5 m to 10 m. Then the increase in its potent energy is __________ . (take g = 10 ms-2)
25 J
250 J
150 J
100 J
If the velocity of a moving body is doubled,the kinetic energy will be
Doubled
Halved
Four times
One-fourth
When a proton is brought near another proton its
K.E increases
P.E increases
Both K.E and P.E increases
P.E decreases
Which of the following expressions does not represent power?
P=w/t
P=FV cosθ
P=FV
P=Fa/t
A body when acted upon by a force 10 kgf, gets displaced by 0.5 m. Calculate the work done by the force, when the displacement is in the direction of force.
50 J
49 J
5 J
4.9 J
What kind of energy transfer takes place in a solar cell?
Light energy is to kinetic energy
Light energy is to potential energy
Light energy is to electrical energy
Light energy is to Mechanical energy
A freely falling body during its motion possess
Mechanical energy
Only potential energy
Only kinetic energy
No mechanical energy.
A weight lifter lifted a load of 200 kgf to a height of 2.5 m in 5 s. Then the work done by him is ( take g = 10 N kg-1 ).
1000 J
500 J
5000 J
A body at rest when acted upon by a force 'F' moves with an acceleration 'a' for time ' t.' Then the power spent on the body is
aFt
2aFt
aFt2
1/2aFt
Which of the following case possess potential energy?
A moving cricket ball
A moving bus
The bob of a simple pendulum at its mean position
A piece of stone placed at the roof
