A coolie with a load on his hand is walking on a straight platform. What is work done?

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Solution

We know that work done $= \to F . \to S$
$\Rightarrow W = F S cos θ$
Here the angle between the direction of load and its motion is 90.So,
$= F S cos 90^{0} = F S (0) = 0 J$

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A coolie with a load on his hand is walking on a straight platform. What is work done?

We know that work done =→F.→S⇒W=FScosθHere the angle between the direction of load and its motion is 90.So,=FScos900=FS(0)=0J

We know that work done $= \to F . \to S$
$\Rightarrow W = F S cos θ$
Here the angle between the direction of load and its motion is 90.So,
$= F S cos 90^{0} = F S (0) = 0 J$