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fluffy91
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[SOLVED] Help on tis quadratic functions question
The speed v m/s of a particle traveling from A to B at time t s after leaving A, is given by v =10t-t². the particle starts from rest at A and comes to rest at B. Show that the particle has a speed of 5m/s or greater for exactly 4[tex]\sqrt{5}[/tex] s
NOne
10t-t²>5
t²-10t+5 <0
0.52 < t < 9.47
then i don't know how to do already.
Can someone start me off and guide me along?
Homework Statement
The speed v m/s of a particle traveling from A to B at time t s after leaving A, is given by v =10t-t². the particle starts from rest at A and comes to rest at B. Show that the particle has a speed of 5m/s or greater for exactly 4[tex]\sqrt{5}[/tex] s
Homework Equations
NOne
The Attempt at a Solution
10t-t²>5
t²-10t+5 <0
0.52 < t < 9.47
then i don't know how to do already.
Can someone start me off and guide me along?