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
54 J
64 J
A person pulls a body on a horizontal surface by applying a force of 5.0 N at an angle of 300 with the horizontal.Find the workdone by this force in displacing the body through 2.0 m?
5√3 J
6√2 J
7√3 J
4√3 J
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
588 J
688 J
858 J
600 J
By what factor does the kinetic energy of a particle increase if the velocity is increased by a factor of three?
6
7
8
9
1 kWh =
3.6 x 106 Js
3.6 x 105 Js
3.6 x 109 Js
3.6 x 10-6 Js
What is the velocity of a body of mass 100 g having a K.E. of 20 J?
2 m s-1
20 m s-1
40 m s-1
400 m/s
A radio set of 60 watts runs for 50 hours.How many 'units ' (kWh) of electrical energy is consumed ?
6 kWh
4 kWh
3 kWh
30 kWh
Two bodies of equal weight are kept at heights of h and 1.5 h respectively.The ratio of their P.E. is
1:2
2:3
1:3
2:4
The energy possessed by a body due to its motion is called
Kinetic energy
Potential energy
Static energy
Mechanical energy
1 hp is equal to
0.746 kW
7.46 kW
74.6 kW
746 kW
