Question

A force of (2 + 41 ) Nacts on a body displaces it by (2 + 4ſ) m. Find the workdone by
force
a] 15 j
b]20 j
c] 12 j
d] 28 j
question no. 7 please help
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Answer 1

Answer:

$</strong><strong>w</strong><strong>o</strong><strong>r</strong><strong>k</strong><strong>,</strong><strong> </strong><strong> </strong><strong>\</strong><strong>:</strong><strong>\</strong><strong>:</strong><strong>\</strong><strong>:</strong><strong>W</strong><strong>\</strong><strong>:</strong><strong>=</strong><strong>\</strong><strong>:</strong><strong>Fs</strong><strong> </strong><strong>\</strong><strong>sin</strong><strong> </strong><strong>\</strong><strong>t</strong><strong>h</strong><strong>e</strong><strong>t</strong><strong>a</strong><strong>\</strong><strong>\</strong><strong>\</strong><strong>:</strong><strong>\</strong><strong>:</strong><strong>\</strong><strong>:</strong><strong>\</strong><strong>:</strong><strong>\</strong><strong>:</strong><strong>=</strong><strong>\</strong><strong>:</strong><strong>Fs</strong><strong>$

so W = (2i+4j).(2i+4j)

= 4+16 = 20 J