Advertisements
Advertisements
Question
When an object falls freely towards the earth, then its total energy :
Options
increases
decreases
remains constant
first increases and then decreases
Solution
Total energy of a freely falling object remains conserved.
Therefore the answer is, (c) Remains constant
APPEARS IN
RELATED QUESTIONS
In what way does the temperature of water at the bottom of a waterfall differ from the temperature at the top? Explain the reason.
State whether the object possess kinetic energy, potential energy, or both :
A man climbing a hill _____________.
State whether the object possess kinetic energy, potential energy, or both :
A stretched spring lying on the ground ____________.
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his potential energy at the highest point? (g = 10 m/s2)
Water stored in a dam possesses :
Name the device or machine which convert :
Chemical energy into electrical energy.
Name the device or machine which convert :
Heat energy into kinetic energy (or mechanical energy).
Write the energy transformations which take place in an electric bulb (or electric lamp).
A body of mass 10 kg falls from a height of 20 m to 8 m. Calculate:
- the loss in potential energy of the body, and
- the total energy possessed by the body at any instant? (Take g = 10 m s-2)