Advertisements
Advertisements
Question
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
Advertisements
Solution
The kinetic energy at the highest point is zero because at the highest point, velocity of the high jumper becomes zero.
APPEARS IN
RELATED QUESTIONS
State the condition under which the mechanical energy is conserved.
Name the device which converts electrical energy into mechanical energy.
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Chemical energy into electrical energy.
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?
What do you understand by the term 'transformation of energy"? Explain with an example.
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
The device which converts mechanical energy into energy which runs our microwave oven is :
A microphone converts :
In the case of negative work, the angle between the force and displacement is
