Advertisements
Advertisements
Question
The hanging bob of a simple pendulum is displaced to one extreme position B and then released. It swings towards centre position A and then to the other extreme position C. In which position does the bob have :
(i) maximum potential energy?
(ii) maximum kinetic energy?
Advertisements
Solution
The extreme positions of the given pendulum are B and C. The centre position is A.
(a) Maximum potential energy is at B and C because at these two positions, the bob is at maximum height from ground. Kinetic energy at these points is zero.
(b) Maximum kinetic energy is at A because at this position, the bob has maximum velocity. Potential energy at this point is zero.
APPEARS IN
RELATED QUESTIONS
Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going?
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
What type of energy is possessed : by the piece of stone which is thrown away on releasing the stretched rubber strings of catapult?
Two bodies having equal masses are moving with uniform speeds of v and 2v respectively. Find the ratio of their kinetic energies.
Name the device or machine which convert :
light energy into heat energy.
What kind of energy transformation take place at a hydroelectric power station?
Describe the energy changes which take place in a radio.
A bulb lights up when connected to a battery. State the energy change which takes place :
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
Name the energy transfers which occur when :
an electric ball rings
