Question

A crowbar of length 100 cm is used to lift a load of 50 N.find the mechanical advantage of the crowbar and the effort applied at the other end

Answer 1

The mechanical advantage of the crowbar and the effort are as follows:

Explanation:

It is given that,

Length of the crowbar is 100 cm

Load car, l = 20 cm

Force applied by the crowbar to lift, F = 50 N

Effort arm of the crowbar, l' = 100 - 20 = 80 cm

The mechanical advantage of the crowbar is the ratio of effort arm to the load arm as :

$MA=\dfrac{l'}{l}$

$MA=\dfrac{80}{20}$

MA = 4

Also the mechanical advantage is the ratio of load to the effort as :

$MA=\dfrac{F}{E}$

$E=\dfrac{F}{MA}$

E is the effort applied at the other end

$E=\dfrac{50}{4}$

E = 1.25 N

Hence, this is the required solution.

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Answer 2

Explanation:

The mechanical advantage of the crowbar and the effort are as follows:

Explanation:

It is given that,

Length of the crowbar is 100 cm

Load car, l = 20 cm

Force applied by the crowbar to lift, F = 50 N

Effort arm of the crowbar, l' = 100 - 20 = 80 cm

The mechanical advantage of the crowbar is the ratio of effort arm to the load arm as :

MA=\dfrac{l'}{l}MA=

l

l

′

MA=\dfrac{80}{20}MA=

20

80

MA = 4

Also the mechanical advantage is the ratio of load to the effort as :

MA=\dfrac{F}{E}MA=

E

F

E=\dfrac{F}{MA}E=

MA

F

E is the effort applied at the other end

E=\dfrac{50}{4}E=

4

50

E = 1.25 N

Hence, this is the required solution.

Learn more :

Mechanical advantage

https://brainly.in/question/1168491