58 892
Assignments Done
Successfully Done
In March 2018
Your physics homework can be a real challenge, and the due date can be really close — feel free to use our assistance and get the desired result.
Be sure that math assignments completed by our experts will be error-free and done according to your instructions specified in the submitted order form.
Our experts will gladly share their knowledge and help you with programming homework. Keep up with the world’s newest programming trends.

Answer on Mechanics | Relativity Question for Gabriel

Question #23311
An elevator is moving upward at 1.20 m/s when it experiences an acceleration 0.33 m/s2 downward, over a distance of 0.69 m. What will its final velocity be?
Expert's answer
The distance equal:
S = v*t - a*t^2/2
v - initial velocity
a - acceleration
t - time
t^2 - 2*v/a *t + 2*S/a = 0
t^2 - 7.2 t + 4.14 = 0
Solutions of this equation are:
t1& = 0.63 s &
t2 = 6.64 s
t1 - this is a time when elevator was moving upward
t2 - this is a time when elevator was moving downward
We need a time when elevator was moving upward, so t=t1 ->
v_f = v - a*t
v_f - final velocity
v_f = 1.2 - 0.63*0.33 = 1 m/s
Answer: final velocity will be 1 m/s

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!


No comments. Be first!

Leave a comment

Ask Your question