Thursday, October 6, 2011
Class IX Work Power and Energy notes(Physics)
CBSE PHYSICS:Class IX Work Power and Energy notes(Physics):Work: In our daily life anything that makes us tired is known as work. For example, reading, writing, painting, walking, etc.
In physics work (W) is said to be done, when a force (F) acts on the body and point of application of the force is displaced (s) in the direction of force.
Work done = force x displacement
W = F x s
(i) If the body is displaced in the same direction of force, Work done is positive