According to ______________ energy can only be converted from one form to another, it can neither be created nor be destroyed.
1st Law of Newton.
Uncertainty Principle.
Law of Conservation of Energy.
3rd Law of Newton.
The energy possessed by a body due to its motion is called ________________.
Static energy
Kinetic energy.
Potential energy
None of these
An object of mass 1kg has a P.E of 1J relative to the ground when it is at a height of.
0.102m.
1m.
9.8m.
32m.
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
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
What is the unit of work done?
Newton.
Walt.
Joule.
Coulomb
A compressed spring possesses ___________ energy.
Kinetic.
Elastic potential.
Electric.
Magnetic.
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.
Which of the following is a scalar quantity?
Work.
Velocity.
Acceleration.
Force.
An object of mass 15 kg is moving with a uniform velocity of 4m/s. What is the kinetic energy possessed by the object.
120J.
100J.
220J.
200J.
