Question

Which one of the following examples is doing the most work? Group of answer choices pushing a box 100 m with a force of 200N pulling a box 10 m with a force of 100 N pulling a sled 1000 m with a force of 10N pushing a car with a force of 100000 N and it doesn't move

Answer 1

Answer:

Most work is done in the first case;pushing a box 100m with a force 200N.

Explanation:

assuming that each case force is in the direction of displacement

so W=F.S.cosФ =F×S×cos0 = F×S×1 = FS

So,in all the four cases,general equation of W=FS

first case:

W=F.S= 200×100 = 200×100= 20000N

second case:

W=F.S= 100×10 = 100×10= 1000N

third case:

W=F.S= 10×1000 = 10×1000= 10000N

fourth case:

in this case,the car doesn't move

that means S=0

W=F.S= 100000× 0= 0N

So,in the first case,most work is done

Hope this helps you

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