57 262
Assignments Done
99%
Successfully Done
In February 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 Sarah-Eve Turcotte

Question #9818
Hi I have a question for my physics' homework!
It's about projectile.
Here is the question:
A projectile is launched from a height of 20 m with a velocity oriented 30 degrees above the horizontal. If the height reached is 45m, what is the initial velocity of the shot?

Thank you
Expert's answer
Let initial velocity is V.
Height actually reached h = 45 - 20 = 25 m.
Vy
is vertical component of initial velocity, so Vy = V * sin(30) = 0.5 * V.
m *
V^2 / 2 = m * g * delta(h). As horizontal component of velocity is
constant,
Vy ^ 2 = 2 * g * 25
Vy = sqrt (50 * g)
V = Vy / sin(30) = 2 *
sqrt (50 * g) = 44.295 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!

Comments

No comments. Be first!

Leave a comment

Ask Your question