Advertisements
Advertisements
प्रश्न
Give an example
Electrical energy changes to heat energy.
Advertisements
उत्तर
Electric iron
APPEARS IN
संबंधित प्रश्न
Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.
A sailboat is moving due to wind energy.
Each of the following statement describes a force acting. Which force is causing work to be done?
An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate
(i) the amount of work done, (ii) the power of the machine.
Give an example
Chemical energy changes to electrical energy.
A man climbs a slope and another walks same distance on level road. Which of the two expends more energy and why?
A force can cause an object to change its ______.
Force acting on a particle moving in a straight line varies with the velocity of the particle v as F = `K/v`, where K is a constant. The work done by this force in time t is
