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klasskru [66]
2 years ago
12

To open a soda can lid, a force of 50 N is applied to a car key, which acts as a lever. If the car key applies a force of 400 N

to the lid, then the mechanical advantage of the car key is ___.
a 12
b 10
c 6
d 8
Physics
1 answer:
kati45 [8]2 years ago
4 0

Explanation:

<u>Given</u><u>.</u> <u>Required</u><u> </u>

wo = 400N. MA=?

wi = 50N

<u>Solution</u>

MA = <u> </u><u>wo</u> = <u>400N</u> =8

wi. 50N

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b)  2.67s

Explanation:

a) ωФ_o_z = (500 rev/min)(1min/ 60s) => 8.333 rev/s

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time 't'= 4 s

angular acceleration 'αФ_Z'=?

constant angular acceleration equation is given by,

ωФ_Z= ωФ_o_z + αФ_Zt

αФ_Z= (ωФ_Z - ωФ_o_z )/t => (3.333-8.333)/4

αФ_Z= -1.25 rev/s²

θ-θФ_o = ωФ_o_z t + 1/2αФ_Zt²

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