- #1
sb13
- 22
- 0
Homework Statement
There is an initially stationary block of mass m on a floor. A force of magnitude 0.500mg is then applied at upward angle θ = 20°. What is the magnitude of the acceleration of the block across the floor if (a)μs = 0.630 and μk = 0.540 and (b)μs = 0.400 and μk = 0.330?
Homework Equations
F= ma
Fk= ukFN
Fs= usFN
The Attempt at a Solution
I know that first I must determine FN, but I don't know how when the mass is m. How do I use that if it is not even a specific value? What do I do when the force is not in Newtons?
I know that to the get mg or gravitational force I would multiply the mass by 9.8, but I am confused about that mass just simply being m.
Then the Fnet,y = may
FN- (applied force which is 0.5 mg in this case... 0.5sin20)- Fg=ma
I don't know where to go from there...