Advertisements
Advertisements
Question
How is work done by a force measured when the force is in the direction of displacement?
Advertisements
Solution
Work = Force × Displacement of the force's application point in the force's direction,
W = F × S
APPEARS IN
RELATED QUESTIONS
What are the S.I. and C.G.S units of work? How are they related? Establish the relationship.
Name the quality which is measured in kW.
What do you understand by the clockwise and anti clockwise moment of force?
State the principle of moments.
A mechanic can open a nut by applying a force of 200 N while using a lever handle of 50 cm length. How long handle is required if he wants to open it by applying a force of only 50 N?
What do you mean by uniform circular motion?
A boy takes 3 minutes to lift a 20 litre water bucket from a 20 m deep well, while his father does it in 2 minutes. Compare:
- the work, and
- power developed by them.
In the following case write yes, if the work is being done and no if no work is being done.
A man moving on the rough ground.
State the condition when the work done by the force is negative.
A man weighing 700 N runs up a flight of 15 steps, each 20 cm high, in 5 seconds. Calculate the power of the man.
