Advertisements
Advertisements
Question
A metal ball of mass 2kg is allowed to fall freely from rest from a height of 5m above the ground.
What the kinetic energy of the ball just before it hits the ground ?
Advertisements
Solution
Kinetic energy of the ball just before hitting the ground =
Initial potential energy= mgh=2 x 10 x 5 = 100 J
RELATED QUESTIONS
A ball is made to fall freely from a height. State the kind/ kinds of energy possessed by the ball when it is at the highest point .
State two characteristic which a source of energy must have.
State whether a solar cell produces a.c. or d.c.
Explain the principle of producing electricity using the nuclear energy.
How is kinetic energy possessed by a moving body measured?
Obtain an expression for the potential energy of a body of mass m at a height h above the ground.
Explain the principle of working of the windmill for generating electricity.
State the energy changes which take place when:
Burning of coal.
A body of mass 0.2 kg falls from a height of 10 m to a height of 6 m above the ground. Find the loss in potential energy taking place in the body. [g = 10ms−2]
Geothermal energy is:
