Amass of 0.273 kg is placed on an incline of 38.382 degrees. it is attached by a rope over a pulley to a mass of 0.254 kg. find the coefficient of friction and the force of friction

here tension in the string is counter balanced by weight of block of mass m1

so we can say

now on the other side the block which is placed on the inclined plane

we can say that component of weight of the block and friction force is counter balanced by tension force

now we can plug in all values to find the friction force

so it will have 0.83 N force on it due to friction

now to find the friction coefficient

here we know that

now from above equation

so friction coefficient will be 0.38

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2