Advertisements
Advertisements
प्रश्न
Name the unit of physical quantity obtained by the formula `(2K)/v^2` Where K: kinetic energy, v: linear velocity
Advertisements
उत्तर
We know that kinetic energy K.E. = `1/2 mv^2`
`∴ (2K)/v^2 = 2 (1/2 mv^2)"/"v^2 = m(mass)`
Hence, the physical quantity obtained is mass and its unit is kilogram (kg)/g/any unit of mass.
APPEARS IN
संबंधित प्रश्न
When a boy doubles his speed, his kinetic energy becomes
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
Two toy-cars A and Bof masses 200 g and 500 g respectively are moving with the same speed. Which of the two has greater kinetic energy?
When an arrow is shot from a bow, it has kinetic energy in it. Explain briefly from where does it get its kinetic energy?
If the speed of a car is halved, how does its kinetic energy change?
What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?
How does the kinetic energy of a moving body depend on its (i) speed, and (ii) mass?
Two objects having equal masses are moving with uniform velocities of 2 m/s and 6 m/s respectively. Calculate the ratio of their kinetic energies.
If an object has 0 momentum, does it have kinetic energy? Explain your answer.
An apple falling from a tree is an example for kinetic energy.
