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3 years ago

How much work is accomplished when a force of 300N pushes a box across the floor for a distance of 100 meters?

Physics

2 answers:

Nesterboy [21]3 years ago

5 0

So the correct ans is B.

hope it helps u.

Wewaii [24]3 years ago

4 0

Answer:

D.30000 J

Explanation:

Work done = force x distance

From the question

Force F = 300N

Distance d = 100m

Therefore using the above formula, we have

W.d = 300N x 100m

= 30000 J

Work done is measured in Joules J

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 » Image distance :

${ \tt{ \frac{1}{v} + \frac{1}{u} = \frac{1}{f} }} \\$

v is image distance
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${ \tt{ \frac{1}{v} + \frac{1}{10} = \frac{1}{5} }} \\ \\ { \tt{ \frac{1}{v} = \frac{1}{10} }} \\ \\ { \tt{v = 10}} \\ \\ { \underline{ \underline{ \pmb{ \red{ \: image \: distance \: is \: 10 \: cm \: \: }}}}}$

 » Magnification :

• Let's derive this formula from the lens formula:

${ \tt{ \frac{1}{v} + \frac{1}{u} = \frac{1}{f} }} \\$

» Multiply throughout by fv

${ \tt{fv( \frac{1}{v} + \frac{1}{u} ) = fv( \frac{1}{f} )}} \\ \\ { \tt{ \frac{fv}{v} + \frac{fv}{u} = \frac{fv}{f} }} \\ \\ { \tt{f + f( \frac{v}{u} ) = v}}$