- #1
Steven2012
- 6
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Homework Statement
A 2kg box traveling at a velocity of 5 m/s hits a spring (k=100 N/cm). Find
a. How much the spring will compress
b. What is the average force on the spring
c. If the surface has μs = 0.15 and μk = 0.12, how far will the box rebound from the spring
d. If the surface is smooth, how far will the box rebound from the spring
Homework Equations
½mv2 = ½kx2
F=ma
s=v0t+½at2
The Attempt at a Solution
a. ½mv2 = ½kx2
½*2*52 = ½*100*x2*100 (to change to m)
0.005 = x2 --> x=7.07cm
b. Favg = ½mv2
---this doesn't seem right---
c. F=ma
0.12*2*9.81*a --> 2.3a
---What is my F?--- Do I use Faverage ? ---
Then s=v0t+½at2
d. With no friction, v=5m/s