Self Exercise 8.1 Question 2
[size=150][b]A particle moves along a straight line and passes through a fixed point [i]O[/i]. Its velocity, [i]v[/i] ms[sup]-1 [/sup],is given by [/b][math]v=t^2-8t+7[/math][b], where [i]t[/i] is the time in seconds after passing through [i]O[/i].[/b][/size]
[size=150][b](a) Find the instantaneous velocity, in ms[sup]-1[/sup], of the particle when[/b] [/size][math]t=3.[/math]
[size=150][b](b) Calculate the values of [i]t[/i], in seconds, when the particle stops instanteneously.[/b][/size]
[size=150][b](c) Determine the range of values of [i]t, [/i]in seconds, when the paticle moves to the left.[/b][/size]