1 kilo watt =
10 watts
100 watts
500 watts
1000 watts
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
When the force acts opposite to the direction of displacement
Work done is negative
Work done is positive
Work done is neutral
No work is done
An object of mass 15 kg is moving with a uniform velocity of 4m s-1 .What is the kinetic energy possessed by the object?
120 J
100 J
220 J
200 J
Unit of power is
Watt
Joule
Newton
Pascal
Two bodies of equal weight are kept at heights of h and 1.5 h respectively.The ratio of their P.E. is
3 : 2
2 : 3
1 : 1
1 : 2
Which of the following is true when a body starts falling?
Its kinetic energy changes to potential energy
No change taken place
Energy becomes zero
Its potential energy changes to kinetic energy
An object of mass 15 kg is moving with a uniform velocity of 4m s-1.What is the kinetic energy possessed by the object?
The kinetic energy possessed by an objects of mass, m and moving with a uniform velocity v is
K.E = 2 m v2
K.E = 1/2 m v2
K.E = 1/4 m v2
K.E = 4m v2
Which of the following is due to position or state of strain?
Kinetic energy
Potential energy
Mechanical energy
Electrical energy
