Question

imi experiments with pulleys in physics class. she applies 70 newtons of force to a single pulley to lift a bowling ball. by adding another pulley, shed get a mechanical - advantage of 2. whats the minimum input force shell need to lift the ball if she adds another pulley? select the correct answer. a 2 n b 35 n c 68 n d 70 n e 140 n

Explanation:

Step1: Determine load force

With single pulley (MA=1), load = input force = 70 N

Step2: Calculate new input force

Input force = Load / MA = 70 N / 2 = 35 N

Answer:

B. 35 N