Advertisements
Advertisements
प्रश्न
By how much will the kinetic energy of a body increase if its speed is doubled?
Advertisements
उत्तर
Kinetic energy of a body is directly proportional to the square of velocity. So, the kinetic energy will become four times the initial value when velocity is doubled.
संबंधित प्रश्न
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.
Name the unit of physical quantity obtained by the formula `(2K)/v^2` Where K: kinetic energy, v: linear velocity
When a boy doubles his speed, his kinetic energy becomes
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?
If the speed of a body is halved, what will be the change in its kinetic energy?
On what factors does the kinetic energy of a body depend?
Which would have a greater effect on the kinetic energy of an object : doubling the mass or doubling the velocity?
How fast should a man of 50 kg run so that his kinetic energy be 625 J?
A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the ground? (g = 9.8 m/s2)
On a level road, a scooterist applies brakes to slow down from a speed of 10 m/s to 5 m/s. If the mass of the scooterist and the scooter be 150 kg, calculate the work done by the brakes. (Neglect air resistance and friction)
A horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
When a ball is thrown inside a moving bus, does its kinetic energy depend on the speed of the bus? Explain.
Which of the following does not posses the ability to do work not because of motion?
Water stored in water dams possesses kinetic energy.
What is energy of motion? Give examples.
When the speed of a moving object is doubled, then its kenetic energy ______.
A ball of mass 0.5 kg slows down from a speed of 10 m s−1 to that of 6 m s−1. Calculate the change in the kinetic energy of the ball.
