- #1
Sace Ver
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Mentor's note: Thread title changed to be decriptive of the problem
Homework Statement
An electric motor is used to pull a 125 kg box across a floor using a long cable. The tension in the cable is 350N and the box accelerates at 1.2m/s2 (forward) for 5.0s. The cable breaks and the box slows down and stops. Calculating the coefficient of kinetic force?
Given:
m=125 kg
a= 1.2 m/s2
t= 5.0s
Ft=350 N
Homework Equations
uk=Fk / FN
The Attempt at a Solution
Fnet = ma
Fnet = (125kg)(1.2m/s2)
Fnet = 150
Thought Fk would be 350N because that's the Ft.
And then Uk would equal 350N divided by 150 but I got 2.3 when the answer is 0.16 not sure how to get answer?
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