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Akimi4 [234]
3 years ago
7

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30 Newtons. What must the inp

ut force be?15 N20 N40 N60 N
Physics
1 answer:
slavikrds [6]3 years ago
5 0

The correct answer is 15 N.

Explanation:

The mechanical advantage of a machine is calculated as,

M.A = Output Force/ Input Force

Given, mechanical advantage=2

Output force = 30 N

Substituting the values,

2=\frac{30}{I.F}

Input force = 15 N

∴ The input force must be 15 N.

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The superheroine Xanaxa, who has a mass of 68.1 kg , is pursuing the 75.3 kg archvillain Lexlax. She leaps from the ground to th
Alexandra [31]

The concept required to solve this problem is associated with potential energy. Recall that potential energy is defined as the product between mass, gravity, and change in height. Mathematically it can be described as

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m = mass of super heroine

g = Acceleration due to gravity

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h_f = -16.1m

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\Delta h = -16.1m-0m

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4 0
3 years ago
How much heat is released as a 5.89 kg block of aluminum cools from 462 °C to 315 °C. The specific heat capacity of aluminum is
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Mass, m = 5890g
Change in temperature, θ = Final_temperature - Initial_temperature
= 315 - 462°C
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A helicopter lifts a 72 kg astronaut 15 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/
NemiM [27]

Answer:

a) F_H=776.952\ N

b) F_g=706.32\ N

c) v=5.4249\ m.s^{-1}

d) KE=1059.48\ J

Explanation:

Given:

  • mass of the astronaut, m=72\ kg
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a)

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Here the lift force is the resultant of the force of gravity being overcome by the force of helicopter.

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c)

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KE=0.5\times 72\times 5.4249^2

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