Advertisements
Advertisements
Question
What is the kinetic energy of a body of mass 1 kg moving with a speed of 2 m/s?
Advertisements
Solution
We have to find the kinetic energy of the moving body. We have,
Mass of the body (m) = 1 kg
Speed of the moving body (v) = 2 m/s
So,
`K.E = 1/2 mv^2`
Where,
K.E - Kinetic Energy
m - Mass
v - Speed
Therefore,
`K.E = 1/2 (1) (2)^2 "J"`
= 2 J
So , the kinetic energy of the moving object is 2 J .
APPEARS IN
RELATED QUESTIONS
What is the kinetic energy of an object?
An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.
Certain force acting on a 20 kg mass changes its velocity from 5 m s-1 to 2 m s-1. Calculate the work done by the force.
Define the term kinetic energy. Give one example of a body which possesses kinetic energy.
State two factors on which the kinetic energy of a moving body depends.
A car is moving with a speed of 15 km h-1 and another identical car is moving with a speed of 30 km h-1. Compare their kinetic energy.
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.
When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.
Find out the form of energy possessed by the following thing.
Water falls
When stored water falls down, potential energy of water is converted into ______.
