Advertisements
Advertisements
Question
How is kinetic energy possessed by a moving body measured?
Solution
The kinetic energy possessed by a moving body is measured by the amount of work done by an opposing force in bringing the body to rest from its present state of motion.
APPEARS IN
RELATED QUESTIONS
A boy of mass m climbs up a staircase of vertical height h.
(a) What is the work done by the boy against the force of gravity?
(b) What would have been the work done if he uses a lift in climbing the same vertical height?
Name the type of energy (kinetic energy K or potential energy U) possessed in the given case:
A stretched wire
Renewable source of energy is:
A hydroelectric power station takes its water from a lake whose water level is 50 m above the turbine. Assuming an overall efficiency of 40%, calculate the mass of water which must flow through the turbine each second to produce power output of 1 MW. (Take g = 10 m s-2)
What is dissipation of energy?
A ball of mass 200 g falls from a height of 5 m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s−2)
Use your brain power!
Why do tablets of camphor decrease in size day by day?
Use your brain power!
How do we save fuel by using public transport?
What is meant by energy?