Which of the following graphs closely represents the kinetic energy (k) of a freely falling body and its height (h) above the ground?
A body is dropped from a certain height from the ground. When it is half way down,it possess :
Only K.E.
Both K.E and P.E
Only P.E
Zero energy
Unit of workdone is
newton
watt
joule
weber
An object of mass 12 kg is at a certain height above the ground. If the potential energy of the object is 480 J,find the height at which the object is with respect to the ground? Given g = 10 ms-2
4 m
4 mm
40 m
400 m
The work done in lifting a mass of 1 kg to a height of 9.8 m is
1 J
(9.8)2J
9.8 J
None of these
1 hp is equal to
0.746 kW
7.46 kW
74.6 kW
746 kW
The mass of an object P is double the mass of Q. If both move with the same velocity, Find out the ratio of K.E.of P to Q ?
1:2
2:1
1:4
4:1
Which type of energy does the flowing water possess ?
Gravitational
Potential
Electrical
Kinetic
A compressed spring possesses which type of energy ?
Elastic potential
Electric
Magnetic
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
