Ascrew has 4 threads per centimeter and a circumference of 2 centimeters. the mechanical advantage of the screw is .

The answer is 8.

n - number of threads per centimeter: n = 4 threads per centimeter:
C - circumference: C = 2 cm

Step 1. Calculate the pitch (P) which is reciprocal to the number of threads per centimeter:
P = 1/n
P = 1/4

Step 2. Calculate the mechanical advantage (MA) by dividing the circumference (C) of by the pitch (P) of the screw:
MA = C/P
MA = 2 / 1/4
MA = 2/1 * 1/4
MA = 2 * 4
MA = 8