Advertisements
Advertisements
प्रश्न
A ball of mass 0.20 kg is thrown vertically upwards with an initial velocity of 20 m s-1. Calculate the maximum potential energy it gains as it goes up.
उत्तर
Potential energy at the maximum height = initial kinetic energy
= `1/2` mv2
= `1/2×0.20 ×20 ×20`
= 40 J.
APPEARS IN
संबंधित प्रश्न
A ball is placed on a compressed spring. What form of energy does the spring possess? On releasing the spring, the ball flies away. Give a reason.
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
A pendulum is oscillating on either side of its rest position. The correct statement is:
What type of energy is possessed : by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
What type of energy is possessed : by the stretched rubber strings of a catapult?
Define the term 'energy' of a body. What is the SI unit of energy.
Name the device or machine which convert :
Electrical energy into heat energy.
Name the device or machine which convert :
light energy into heat energy.
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
Describe the energy changes which take place in a radio.
