In elementary mechanics, gravitational potential energy and kinetic energy are the two components of which category of energy?
Mechanical energy
Mechanical energy is the sum of macroscopic kinetic and potential energies. Chemical energy also involves microscopic interactions, so the question specifically concerns elementary mechanics.
An electric lamp of 100 W is used for 5 hours per day. How much energy will be consumed by the lamp for 3 days?
If a young son works quickly for 2 hours and prepares 16 items in a day, and his old father works slowly for 8 hours and prepares 24 items a day, which of the following is true.
A drum of mass ‘m’ kg was rolled down a ramp. At the bottom of the ramp its kinetic energy was 10 kJ and velocity was 20 m/s. With what velocity (in m/s) was it pushed down the ramp if its initial kinetic energy was 625 J?
The efficiency of a pump is 50%. It lifts 2 tonnes of water by 60 m in 20 minutes. Find the input power (in kW) of the pump.
What happens to the Potential and Kinetic energies of a body as it falls down from a height?
9800 Joules of energy was spent to raise a mass of 80 kg. The mass was raised to a height of______
The energy possessed by a body due to its change in position or shape is called:
The capacity to do work is called:
One horse power is equals to ________.
A car loses 200 kJ of kinetic energy when its speed decreases from 25 m/s to 15 m/s. Find its mass in tonnes.
An object having the capability to do work is said to possess____________.
One erg is equal to ________ Joule.
An electric lamp of 100 W is used for 5 hours per day. How much energy will be consumed by the lamp for 3 days?
When you compress a spring you do work on it. The elastic potential energy of the spring: