i) When is the work done said to be zero?ii) Give two examples from daily life where according to physics, work done is zero.
Answers
Answered by
204
Workdone :
Work is said to be done when a Fore F acts on an object and object moves through a distance S in the direction of force.
W=F X S ----------(1)
Workdone can be positive , negative or Zero.
Work Done can be zero when any of these things happen:-
--> When the force applied is Zero or
---> When displacement is zero
---> If θis 90° then Workdone is zero. W= FScosθ
Examples:
1.A person carrying heavy luaggage and waiting for train on a platfrom.
2.A girl pushing a heavy rock.
Work is said to be done when a Fore F acts on an object and object moves through a distance S in the direction of force.
W=F X S ----------(1)
Workdone can be positive , negative or Zero.
Work Done can be zero when any of these things happen:-
--> When the force applied is Zero or
---> When displacement is zero
---> If θis 90° then Workdone is zero. W= FScosθ
Examples:
1.A person carrying heavy luaggage and waiting for train on a platfrom.
2.A girl pushing a heavy rock.
Answered by
112
When work done=F×S
then,
Work done is said to be zero when force applying to the body is zero or the Displacement done by body pic zero.
when work done=FScostheta
if the value that means force acting on body is perpendicular then the force acting will be equals to zero.
For e.g.
=>The food seller carrying his loads on his head, standing at a place.
=>A man pushing wall.
in these two case the work done will be equal to zero according to physics.
then,
Work done is said to be zero when force applying to the body is zero or the Displacement done by body pic zero.
when work done=FScostheta
if the value that means force acting on body is perpendicular then the force acting will be equals to zero.
For e.g.
=>The food seller carrying his loads on his head, standing at a place.
=>A man pushing wall.
in these two case the work done will be equal to zero according to physics.
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