Advertisements
Advertisements
प्रश्न
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. What happens to the mechanical energy after the ball hits the ground and comes to rest?
Advertisements
उत्तर
After the ball hits the ground and comes to rest, its mechanical energy is converted into heat, sound, and deformation energy due to the impact.
APPEARS IN
संबंधित प्रश्न
State the energy changes in the following case while in use:
An electric iron
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a loaded truck when started and set in motion.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in a car going uphill.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in photosynthesis in green leaves.
Energy can exist in several forms and may change from one form to another. State the energy changes that occur in respiration.
State the energy changes in the following case while in use:
loudspeaker
State the energy changes in the following case while in use:
a steam engine
Avinash can run with a speed of 8 m s–1 against the frictional force of 10 N, and Kapil can move with a speed of 3 m s–1 against the frictional force of 25 N. Who is more powerful and why?
A boy is moving on a straight road against a frictional force of 5 N. After travelling a distance of 1.5 km he forgot the correct path at a roundabout (Fig. 11.1) of radius 100 m. However, he moves on the circular path for one and half-cycle and then he moves forward up to 2.0 km. Calculate the work done by him.
Can any object have mechanical energy even if its momentum is zero? Explain.
