# physics

posted by
**Will**
.

The figure below shows an initially stationary block of mass m on a floor. A force of magnitude F = 0.570·mg is then applied at upward angle è = 22°.

(a) What is the magnitude of the acceleration of the block across the floor if (a) ìs = 0.600 and ìk = 0.500?

(b) What is the magnitude of the acceleration of the block across the floor if ìs = 0.400 and ìk = 0.300?