MAHE Manipal B.Sc Nursing 2025
ApplyAccorded Institution of Eminence by MoE, Govt. of India | NAAC A++ Grade | Ranked #4 India by NIRF 2024
Work done by variable force is considered one the most difficult concept.
19 Questions around this concept.
A time-dependent force F=6t acts on a particle of mass 1 kg. If the particle starts from rest, the work (in Joule) is done by the force during the first 1 sec. will be :
A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work (in Joule) done in pulling the entire chain on the table?
Force F on a particle moving in a straight line varies with distance d as shown in the figure. The work done on the particle during its displacement of 12m is
NEET 2025: Biology: Mind Maps & Important Diagrams | Mock Test (Free)
NEET 2025: Syllabus | Most Scoring concepts | NEET PYQ's (2015-24)
New: Meet Careers360 experts in your city and get guidance on shortlisting colleges
New Programme: B.E. Environmental & Sustainability @ BITS Pilani for PCB Candidates
Work done by static friction on an object:
And work done by the variable force is given by -
Where
When Force is time-dependent
And we can write
So,
Where
Work Done Calculation by Force Displacement Graph
The area under the force-displacement curve with the proper algebraic sign represents work done by the force.
Work done by the frictional force is zero -
When the force applied on a body is insufficient to overcome the friction.
Work done by the frictional force is negative
When the force is large enough to overcome the friction
Work done by the frictional force is positive
When force is applied on a body, which is placed above another body ,the work done by the frictional force on the lower body
maybe positive.
"Stay in the loop. Receive exam news, study resources, and expert advice!"