- #1
bearsa113609
- 2
- 0
Homework Statement
A certain force moves a 4kg box from rest to a velocity of 6m/s in 3 seconds. If the coefficient of friction between the box and floor is 0.05, what is the magnitude of the force?
m=4kg
v0=0
v=6m/s
t=3s
μk=0.05
Homework Equations
a=v/t
F0=mg
P=Ft
P=mv
The Attempt at a Solution
a=(6)/(3)=2m/s
F0=(4)(9.8)=39.2N
Pc=(39.2)(3)=117.6
P=(4)(6)=24