Advertisements
Advertisements
Question
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
Solution
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
RELATED QUESTIONS
Two toy-cars A and B of masses 500 g and 200 g respectively are moving with the same speed. Which of the two has the greater kinetic energy?
Give one relevant example for the following transformation of energy :
Electrical energy to light energy.
What is geo thermal energy? Explain in brief.
Write the type of energy possessed in the following case:
A moving cricket ball.
State the energy changes which take place when:
In a heat engine.
State the energy changes which take place when:
A stone projected vertically upwards, returns back to the thrower.
State the energy changes which take place when:
Water freezes in the freezing chamber of a fridge.
A body of mass m is taken from a height h to 2h. What is the increase in its potential energy?
Geothermal energy is:
Name the type of energy (kinetic energy K or potential energy U) possessed in the following case:
A moving cricket ball
