The answer of this question is 0.6m/s
Amman oak smoke skins kaons
Answer:
Explanation:
Given
Force exerted by machine 
Weight of Block 
Considering inclination to be 
After resolving Forces We get







Refer to the diagram shown below.
For dynamic balance,
1.5W - 2.5F = 0
W = (2.5*F)/1.5
= (2.5*40)/1.5
= 66.667 N
Because the lever is 80% efficient, the actual maximum load that can be lifted is
0.8*66.667 = 53.3 N
Answer: D. 53.3 N