physics
posted by beav .
an initially stationary block of mass m on a floor. A force of magnitude 0.540mg is then applied at upward angle of 16. What is the magnitude of the acceleration of the block across the floor if (a)Us=0.6 and Uk=0.5 and (b)Us=0.4 and Uk=0.3 ?

Exactly what is a force of magnitude of xxx mg?

I don't understand what you are refering to?
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