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Homework Statement
If a 2.5 kg rubber ball is rolled across the dry concrete floor with an acceleration of 4.0 m/s^2[E]. Determine the friction force required to stop the ball. (Drawing a free body diagram will help illustrate this situation)
Homework Equations
Fk= µk(Fn)
F=ma
The Attempt at a Solution
a=4.0 m/s^2[E]
m=2.5kg
µk= 1Find Fn=mg
=2.5(9.81)
=24.5
Find friction force to stop the ballFk=1(24.5)
Fk=24.5
Find Fnet=ma
=2.5(4.0)
=10 N(E)
These numbers are telling me that the object should not be moving in the first place? Which is confusing because i am given an acceleration
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