Question

what do you mean by the term work?write its s.l unit .state the condition of zero work.​

Answer 1

In physics, work is the product of force and displacement. A force is said to do positive work if (when applied) the force has a component in the direction of the displacement of the point of application.

S.I. UNIT IS JOULES

condition

1. when force is perpendicular to object
2. when force is perpendicular to objectcircular dispacement
3. when force is perpendicular to objectcircular dispacement2 balanced forces are applied in opposite direction

when force is perpendicular to objectcircular dispacement2 balanced forces are applied in opposite directionin these conditions work done=0

Answer 2

Answer: Work is the amount of energy required for any body to complete a task in a period of time.

Its S.I. unit if Joules (J).

Explanation:

As answered above, it means that how can a body complete a task in a period of time and how much energy will the object or anyone consume. For example, when you ride the bicycle, you consume some amount of energy every time you push the pedal. If you ride for too long, you get tired.

In simple words, work is the amount of energy required for doing any task like riding a bicycle, in a period of time.

(This is out of context)

Types of energy are:

1) Heat energy

2) Light energy

3) Sound energy

4) Electrical energy

5) Muscular energy

ENERGY IS ALWAYS MEASURED IN JOULES OR IN CALORIES.

Hope this helps.