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
RELATED QUESTIONS
State and define the S.I. unit of work.
How is kilowatt hour related to joule?
State two factors on which power spent by a source depends. Explain your answer with examples.
State the condition when the work done by a force is negative. Explain with the help of examples.
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s. Compare the power developed by the persons A and B.
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.
How much work each does? Take density of water = 103 kg m-3 and g = 9.8 N kg-1.
A bullet fired against a window glass pane makes a hole in it without any cracks while a stone striking the same glass pane smashes it; explain with reason.
Derive a relation between the S.I. and C.G.S. unit of force.
Calculate the work done when:
A car is moved on a rough road through 30 m against a frictional resistance of 75 N.
