Which of the following is a scalar quantity?
Work.
Velocity.
Acceleration.
Force.
An object of mass 1 kg has a P.E. of 1J relative to the ground when it is at a height of
0.102 m
1 m
9.8 m
32 m
An engine of 9.8 kw power is to pump water from a well of 90m depth. Calculate the quantity of water it can pump out in one hour?
40,000g.
4000kg.
4000g.
40,000kg.
The unit of power in the the Mks system is.
Joule.
Erg.
Newton.
Watt.
The capacity for doing work is called _______________.
Power.
Energy.
What should be the power of engine used to lift 250 litres of water in 1 minute to a height of 15m?
36750J
612.5J
36750W
612.5W
W = F x _______________.
Momentum (p)
Acceleration(a).
Displacement (s).
Velocity(v).
A bullet of mass 0.2kg is fired with a velocity of 100ms-1 .What is the kinetic energy?
10000J
1000J
10000erg
1000erg
A force of 7N acts on an object. The displacement is 8m in the direction of force. What is the work done?
24 J
56 J
64 J
None of these
A compressed spring possesses _________ energy.
Kinetic
Elastic potential
Electric
Magnetic
