Question #8d57a

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Question #8d57a

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Answer 1 · 2016-04-23T13:39:52

$A) w e i g h t = 800 N$ $A)weight=800N$
$B) w or k = 24000 J$ $B)work=24000J$
$C) P o w e r = 600 W a$ $C)Power=600Wa$

Explanation:

$A)$ $A)$
$weight=mass.gravity acceleration$ $"weight=mass.gravity acceleration"$
$G = w e i g h t$ $G=weight$
$m = m a s s$ $m=mass$
$g = 10 \frac{N}{k} g$ $g=10(N)/(k)g$
$G = m \cdot g$ $G=m*g$
$m = 80 k g$ $m=80kg$
$G = 80 \cdot 10$ $G=80*10$
$G = 800 N weight of beam$ $G=800N" weight of beam"$

$B)$ $B)$
$W or k = F or c e \cdot d i s tan c e$ $Work=Force*distance$
$W or k = W$ $Work=W$
$F or c e = G$ $Force=G$
$d i s tan c e = h$ $distance=h$
$W = G \cdot h$ $W=G*h$
$G = 800 N h = 30 m$ $G=800N" "h=30m$
$W = 800 \cdot 30$ $W=800*30$
$W = 24000 J$ $W=24000J$

$C)$ $C)$
$P o w e r = \frac{Work done}{time}$ $Power="Work done"/"time"$

$P o w e r = P$ $Power=P$

$Work done=W$ $"Work done=W"$

$t i m e = t$ $time=t$

$P = \frac{W}{t}$ $P=W/t$

$W = 24000 J t = 40 s$ $W=24000J" "t=40s$

$P = \frac{24000}{40}$ $P=24000/40$

$P = 600 W a$ $P=600Wa$

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Question #8d57a

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