A particular lever can lift a load with 80 percent efficiency. If 40 N of effort is applied 2.5 meters from the fulcrum, then what is the maximum load that can be lifted 1.5 m from the fulcrum?

A) 5333 N

B) 1920 N

C) 66.7 N

D) 53.3 N

Question

Physics

Irwin

3 January, 18:58

A particular lever can lift a load with 80 percent efficiency. If 40 N of effort is applied 2.5 meters from the fulcrum, then what is the maximum load that can be lifted 1.5 m from the fulcrum?

A) 5333 N

B) 1920 N

C) 66.7 N

D) 53.3 N

+5

Answers (1)

Know the Answer?

Talon Lam · Answer 1

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

A particular lever can lift a load with 80 percent efficiency. If 40 N of effort is applied 2.5 meters from the fulcrum, then what is the maximum load that can be lifted 1.5 m from the fulcrum?A) 5333 NB) 1920 NC) 66.7 ND) 53.3 N

A particular lever can lift a load with 80 percent efficiency. If 40 N of effort is applied 2.5 meters from the fulcrum, then what is the maximum load that can be lifted 1.5 m from the fulcrum?

A) 5333 N

B) 1920 N

C) 66.7 N

D) 53.3 N