Advertisements
Advertisements
प्रश्न
Two bodies have masses in the ratio 5 : 1 and their kinetic energies are in the ratio 125 : 9. Calculate the ratio of their velocities.
Advertisements
उत्तर
Given `m_A/m_B = 5/1`
`K_A/K_B = 125/9`
Since `K_A/K_B = (1/2 m_A V_A^2)/(1/2 m_B V_B^2)`
= `(m_A/m_B)· V_A^2/V_B^2`
`125/9 = 5/1 ⋅ V_A^2/V_B^2 or V_A/V_B = sqrt(25/9)`
= `5/3`
Ratio of velocities of A and B is 5 : 3
APPEARS IN
संबंधित प्रश्न
The kinetic energy of an object of mass m moving with a velocity of 5 m s−1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?
A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
A body falls freely under gravity from rest. Name the kind of energy it will possess on reaching the ground.
On what factors does the kinetic energy of a body depend?
What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?
What do you understand by the kinetic energy of a body?
Which of the following does not posses the ability to do work not because of motion?
Water stored in water dams possesses kinetic energy.
The kinetic energy of a body of mass 4 kg and momentum 6 Ns will be
When a bell fixed on a cycle rings, then the energy conversion that takes place is ______.
