Advertisements
Advertisements
Question
Show that the quantity 2K/v2 has the unit of mass, where K is the kinetic energy of the body.
Advertisements
Solution
Kinetic Energy, K = `1/2 mv^2`
where, m - Mass and V - Linear Velocity
We may now use the equation of a kinetic energy (K) in this `((2k)/V^2)` formula, we get
`therefore (2K)/V^2 = (2 xx 1/2 m V^2)/V^2 ...("Substitute" K = 1/2 mV^2)`
`therefore (2K)/V^2` = m
Therefore, the quantity.
`(2K)/V^2` will have the unit of mass m, which is kilogram (kg).
APPEARS IN
RELATED QUESTIONS
Name the type of energy (kinetic or potential) possessed by the following:
A moving bus.
Name the form of energy which a body may possess even when it is not in motion. Give an example to support your answer.
Name six different forms of energy?
What is the main source of energy for earth?
State two advantages of using nuclear energy for producing electricity.
What happens to the K.E. when
(i) the mass of the body is doubled at a constant velocity and
(ii) the velocity of the body is doubled at constant mass?
Write the type of energy possessed in the following case:
A moving cricket ball.
State the energy changes which take place when:
A toy car spring is wound and car is made to run on level floor.
Give one example when:
Electric energy changes to mechanical energy.
What is meant by energy?
