How much work does it take to lift a $30 k g$ $30 kg$ weight $\frac{3}{2} m$ $3/2 m$ ?

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Answer 1 · 2016-01-29T13:18:20

$Work = F \cdot d$ $"Work" = F*d$ , where $F$ $F$ is the force required to lift it, and $d$ $d$ is how high it is lifted.

The force required to lift an object is its weight (the force of gravity)

Weight: $F_{g} = m g$ $F_g=mg$

I will use 10 for g, you may be using 9.8 or 9.81 in your class.

$F_{g} = 30 k g \cdot 10 \frac{N}{k g} = 300 N$ $F_g=30 kg *10N/(kg)=300N$

$W = F d$ $W=Fd$
$W = 300 N \cdot \frac{3}{2} m$ $W=300N*3/2m$
$W = 450 J$ $W=450J$

How much work does it take to lift a 30kg30 kg weight 32m3/2 m ?