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3 years ago

14

What is the mechanical advantage of a lever that has an input arm of 6 meters and an output arm of 2 meters

1 answer:

Setler79 [48]3 years ago

5 0

Answer:A

Explanation:I TOOK THE Test

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3 years ago

Two particles A and B start simultaneously from a Point P with velocities 20 m/s and 30 m/s respectively. A and B move with acce

zysi [14]

Answer:

<u>20 m/s</u>

Explanation:

<u>Given</u>

u(A) = 20 m/s
u(B) = 30 m/s
acceleration equal in magnitude but opposite in direction

<u>Solving</u>

Velocity of A at Q = 30 m/s
From, P to Q, <u>Δv(A) = 30 - 20 = +10 m/s</u>
Therefore, velocity of B at Q will be decreased by 10 as it is equal in magnitude but opposite in direction to A
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-10 m/s = v(B at Q) - 30 m/s
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6 0

3 years ago

A 57.0 kg cheerleader uses an oil-filled hydraulic lift to hold four 120 kg football players at a height of 1.10 m. If her pisto

lapo4ka [179]

Answer:

The diameter of the piston of the players equals 55.136 cm.

Explanation:

from the principle of transmission of pressure in a hydraulic lift we have

$\frac{F_{1}}{A_{1}}=\frac{F_{2}}{A_{1}}$

Since the force in the question is the weight of the individuals thus upon putting the values in the above equation we get

$\frac{57.0\times 9.81}{\frac{\pi \times (19.0)^{2}}{4}}=\frac{4\times 120\times 9.81}{\frac{\pi \times D_{2}^{2}}{4}}$

Solving for $D_{2}$ we get

$D_{2}^{2}=\frac{4\times 120}{57}\times 19^{2}\\\\\therefore D_{2}=\sqrt{\frac{4\times 120}{57}}\times 19\\\\D_{2}=55.136cm$

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3 years ago