Advertisements
Advertisements
प्रश्न
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)
Advertisements
उत्तर
Given, m = 200 g.
h = 5m.
When the ball reaches the ground then P.E. = K.E.
K.E. = mgh =`200/1000xx9.8xx5` = 9.8 Joule
संबंधित प्रश्न
Calculate the change in the Kinetic energy of a moving body if its velocity is reduced to 1/3rd of the initial velocity.
How many MeV are equivalent to 1 atomic mass unit (u)?
A bucket full of water .is on the first floor of your house and another identical bucket with same quantity of water is kept on the second floor. Which of the two has greater potential energy ?
Give one relevant example for the following transformation of energy:
Electrical energy to heat energy.
State the energy transformation on the following:
Electricity is obtained from nuclear energy.
State the energy changes which take place when:
A toy car spring is wound and car is made to run on level floor.
Give one example when:
Electric energy changes to sound energy.
Give one example when:
Mechanical energy changes to electric energy.
When and why do clothes smell of naphthalene?
Unit of calorific value of a substance is ____________.
