Hi, I really need help UNDERSTANDING this question!What is the final velocity of a car that accelerated 10 m/s2 from rest and traveled 180m? I mean, whats the formula that you do it and and the steps you take? thank you very much

Question

anonymous · Answer

The answer is 60, but why?

paxpolaris · Answer

http://en.wikipedia.org/wiki/Equations_of_motion#Constant_linear_acceleration check out the sub-section: SUVAT equations I learned and used equations 1,2,& 4 in school.... eq. 4 is applicable in your case $$\Large v^2=u^2+2as$$

anonymous · Answer

$$v ^{2}=u ^{2}+2as$$
initial velocity is 0 m/s, i.e u=0m/s
$$v ^{2}=0+2as$$
$$v ^{2}=2as$$
and acceleration is 10 m/s^2 and distance traveled  is 180 m, i.e    a=10 m/s^2    and   s=180 m
$$v ^{2}=2*10*180$$
$$v ^{2}=3600$$
$$v =+60$$
so final velocity is 60m/s  (^_^)

anonymous · Answer

u can solve this in a quite simple way with avarge speed or with a graph.
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the distance is the area under the line (simple triangle)
that is $$V(final)*t/2=180  and V(final)=at $$
solve it for t and u r almost done..

it is just the same using the avarge speed