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
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.
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.
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.
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 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
The energy used in households , industries and commercial establishments are usually expressed in _____________.
Joules.
Watt
KWh.
None of these.
Find the energy possessed by an object of mass 10 kg when it is at a height of 6 m above the ground.Given, g = 9.8 m/s2
858 J
688 J
588 J
600 J
The meaning of the Greek word "Energia" is
Power.
Energy.
Transformation.
