58 929
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 alzahra

Question #37265
The drawing shows two boxes resting on frictionless ramps. One box is relatively light and sits on a steep ramp. The other box is heavier and rests on a ramp that is less steep. The boxes are released from rest at A and allowed to slide down the ramps. The two boxes have masses of 9 and 48 kg. If A and B are 5.5 and 0.5 m, respectively, above the ground, determine the speed of (a) the lighter box and (b) the heavier box when each reaches B. (c) What is the ratio of the kinetic energy of the heavier box to that of the lighter box at B?

Expert's answer
from the conservation energy law : reduction of potential energy equals to increase of kinetic energy

for a small box
Ep=m*g*h - reduction of the potential energy
Ek=m*V^2/2 - increase of the kinetic energy
so Ep=Ek

V=10m/s - velocity does NOT depend on mass

a) velocity of the lighter box V_light=10m/s
b) velocity of the heavier box V_heavy=10m/s
c) ratio of the kinetic energy
R=Ek_heavy/Ek_light=(m_heavy*V^2/2) / (m_light*V^2/2)=m_heavy / m_light = 48/9= 5.33

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