A block of mass $50\, kg$ slides over a horizontal distance of $1\, m$. If the coefficient of friction between their surfaces is $0.2$, then work done against friction is ......... $J$
A block of mass $50\, kg$ slides over a horizontal distance of $1\, m$. If the coefficient of friction between their surfaces is $0.2$, then work done against friction is ......... $J$
$98$
$72$
$56$
$34$
A block of mass $50\, kg$ slides over a horizontal distance of $1\, m$. If the coefficient of friction between their surfaces is $0.2$, then work done against friction is ......... $J$
$W = \mu mgS = 0.2 \times 50 \times 9.8 \times 1 = 98\;J$
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