# Aspherical iron ball 6 in. in diameter is coated with a layer of ice of uniform thickness. if the ice melts at a rate of 12 startfraction in cubed over min endfraction comma how fast is the thickness of the ice decreasing when it is 2 in.​ thick? how fast is the outer surface area of ice​ decreasing?

### Another question on Physics

Physics, 21.06.2019 22:20
Ablock of mass m rests on a block of mass m1 which is on a tabletop. a light string passes over a frictionless pulley and connects the blocks. the coefficient of kinetic friction between the blocks and between the block of mass m1 and the tabletop is the same. a force f pulls the upper block to the left and the lower block to the right. the blocks are moving at a constant speed. which of the following statements is true? a. the block of mass m and the table both exert a leftward-pointing kinetic friction force on the block of mass m1 . b .there is no kinetic friction because the blocks are moving at constant speed. c. the force of kinetic friction between the blocks, and between the block of mass m1 and the tabletop, have the same magnitude because the coefficient of friction is the same. d. the kinetic friction force that acts on the block of mass m points to the left.