Solution 15.2
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(New page: <math>\text{100 grams = 0}\text{.1 kg}\ \text{ }\Rightarrow \ \text{ m = 0}\text{.1 }</math> <math>u = -8</math> <math>\text{m}{{\text{s}}^{-1}}</math> <math>v = 5</math> <math>\text{...)
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Revision as of 16:44, 14 September 2010
\displaystyle \text{100 grams = 0}\text{.1 kg}\ \text{ }\Rightarrow \ \text{ m = 0}\text{.1 }
\displaystyle u = -8 \displaystyle \text{m}{{\text{s}}^{-1}}
\displaystyle v = 5 \displaystyle \text{m}{{\text{s}}^{-1}}
(Note that u and v must have opposite signs as they are in opposite directions.)
\displaystyle \begin{align} & I=mv-mu \\ & 0\textrm{.}1\times 5-0\textrm{.}1\times (-8) \\ & =0\textrm{.}5+0\textrm{.}8 \\ & =1\textrm{.}3\text{ Ns} \end{align}
