Advertisements
Advertisements
प्रश्न
Define the term 'work'. Write the formula for the work done on a body when a force acts on the body in the direction of its displacement. Give the meaning of each symbol which occurs in the formula.
Advertisements
उत्तर
Work is said to be done when a force causes a displacement. It is a scalar quantity that is mathematically given by the scalar product of the applied force and displacement caused. Joule is the SI unit of work. It is denoted by ‘J’.
We have a relation as,
W = FS cos θ
Where,
(F) - Force
(W) - Work
(S) - Displacement
θ - Angle between F and S
When F and S are parallel, θ = 0.
Then, work done is, W = FS
APPEARS IN
संबंधित प्रश्न
An object thrown at a certain angle to the ground moves in a curved path and falls back to the ground. The initial and the final points of the path of the object lie on the same horizontal line. What is the work done by the force of gravity on the object?
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
What is the work done when the object acted upon by a force remains at rest?
Complete the following sentences:
Kilowatt is the unit of ....... and kWh is the unit of
Name the type of energy possessed by a
(i) stretched catapult (ii) hot iron
(iii) wound up clock
Name the CGS unit of work.
List any six forms of energy and write a short note on each of them.
