Processing Math: Done

From Mechanics

Revision as of 17:24, 12 April 2010 (edit) Ian (Talk | contribs) (Removing all content from page) ← Previous diff		Current revision (12:16, 27 March 2011) (edit) (undo) Ian (Talk | contribs)
(3 intermediate revisions not shown.)
Line 1:		Line 1:
		+	In this case we have
		+	<math>\mathbf{u}=4\mathbf{i}</math>
		+	and
		+	<math>\mathbf{a}=0\textrm{.}9\mathbf{i}+0\textrm{.}7\mathbf{j}</math>
		+	Substituting these into the equation
		+	<math>\mathbf{v}=\mathbf{u}+\mathbf{a}t \ \</math>
		+	gives the velocity of the jet-ski at time <math>t=10 \text{ s }</math> as:
		+
		+	<math>\mathbf{v}=4\mathbf{i}+(0\textrm{.}9\mathbf{i}+0\textrm{.}7\mathbf{j})\times 10</math>
		+
		+	which gives
		+
		+	<math>\mathbf{v}=13\mathbf{i}+7\mathbf{j} \ \text{ m}{{\text{s}}^{\text{-1}}}</math>

---

Current revision

In this case we have u=4i and a=0.9i+0.7j

Substituting these into the equation v=u+at   gives the velocity of the jet-ski at time t=10 s as:

v=4i+(0.9i+0.7j)10

which gives

v=13i+7j  ms-1