Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
Name the process used for producing electricity using nuclear energy.
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?
A pebble is thrown up. It goes to a height and then comes back on the ground. State the different changes in form of energy during its motion.
Name the form of energy in which potential energy can change.
State the energy changes which take place when:
A stone projected vertically upwards, returns back to the thrower.
A girl of mass 35 kg climbs up from the first floor of a building at a height 4 m above the ground to the third floor at a height 12 m above the ground. What will be the increase in her gravitational potential energy? [g = 10 ms-2]
A body of mass m falls from a height h1 to a height h2, above the ground (h1 > h2). What is the loss of potential energy?
Use your brain power!
How do we save fuel by using public transport?
You do not have rangoli powder. What things can you use as an alternative?
Energy from various sources is considered to have been derived from the sun. Do you agree? Justify your answer.
