A lever of length 105 cm is used with a fulcrum placed 15 cm from the end bearing the load. Its mechanical advantage is
- 9.
- 7.
- 6.
Explanation
Mechanical advantage of a lever is the effort arm divided by the load arm. With the fulcrum 15 cm from the load, the load arm is 15 cm and the effort arm is 105 - 15 = 90 cm. So MA = 90 / 15 = 6.
Arunkumar222 asking:
Kindly explain with formula
Community Comments (5)
D
dimky Posts: 514 03.12.2014 / 17:46
The TOTAL length is 105 cm, so the input end is 90 cms. 90/15 = 6
J
jimzene Posts: 4 04.06.2017 / 11:33
Why the input is 90cm from where?
J
jimzene Posts: 4 04.06.2017 / 11:34
105/15=7
D
dimky Posts: 514 04.06.2017 / 15:58
Length of leverage behind pivoting point is 105 - 15 = 90
So advantage is 90 / 15 = 6.
So advantage is 90 / 15 = 6.
K
Klemis3000 Posts: 9 14.11.2018 / 09:23
Question like this clearly needs a figure for clarification. Because you can easily assume that total length of lever is 120cm and calculate 105/15=7
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