Advertisements
Advertisements
प्रश्न
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]
Advertisements
उत्तर
Increase in gravitational energy
= mg (h2 − h1)
= 35 × 10 (12 − 4)
= 350 × 8
= 2,800 J
संबंधित प्रश्न
Name the type of energy (kinetic or potential) possessed by the following:
A stretched rubber band.
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 the energy changes in the following case while in use:
an electric bulb
How is wind energy used to produce electricity?
Calculate the decrease in the kinetic energy of a moving body if its velocity reduces to half of the initial velocity.
Write the type of energy possessed in the following case:
A bent bow
Name the two groups in which various sources of energy are classified?
Name a device in which solar energy is converted into electricity state its two uses.
What is meant by energy?
The major problem in harnessing nuclear energy is how to
