Question

If a load 150 N is lifted with an effort 50 N by means of an arrangement of pulleys in the second system. Determine the total number of pulleys in the arrangement when it's efficiency is 60% at load 150N

A)10
B)5
C)6
D)2​

Answer 1

Answer:

6

Explanation:

150N×50N

750N

750N/150N×60%

6

Answer 2

answer

c)6

explanation

total load lifted = 150N

effort = 50 N

efficiency =60%

so

150 ×60%

50

answer is 6 by cuting