Question

a) Define power. State the commercial unit and SI unit of electrical energy. An electric heater of 400W works for 2
hours. Find the electrical energy units consumed in a day.
b) A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?
c) When is 1 joule of work is said to be done?

Answer 1

Answer:

2)When an object falls freely, its potential energy gets converted into kinetic energy and when the object hits the ground its kinetic energy gets converted into heat energy and sound energy. ...

3)One joule is defined as the amount of work done when a force of one newton is exerted through a distance of one meter.

Explanation:

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