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2 years ago

200 N of force is applied to the pedals of a bike has output force of 450 N what is the mechanical advantage of the bike

Physics

1 answer:

enot [183]2 years ago

4 0

Answer:

2.25 N

Explanation:

The formula for mechanical advantage is:

$Mechanical \ Advantage = \frac{F_o}{F_i}$

$F_o$ stands for output force and $F_i$ stands for input force.

We can plug in the given forces into the equation:

$Mechanical \ Advantage = \frac{450\ N}{200\ N}=2.25 \ N$

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The final velocity of the tool is 107.4 m/s

Explanation:

We can solve this problem by using the principle of conservation of energy.

In fact, if air resistance is negligible, the total mechanical energy of the tool is conserved during the fall, so we can write:

$K_i + U_i = K_f + U_f$

where

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$U_i = mgh$ is the gravitational potential energy of the tool at the top, where

m is the mass of the tool

g is the acceleration of gravity

h is the heigth of the tool

$K_f = \frac{1}{2}mv^2$ is the kinetic energy of the tool just before hitting the ground, where

v is the final speed of the tool

$U_f = 0$ is the gravitational potential energy of the tool at the bottom (zero since the height is zero)

Re-arranging the equation,

$mgh=\frac{1}{2}mv^2$

where we have

$g=9.8 m/s^2\\h=588 m$

And solving for v,

$v=\sqrt{2gh}=\sqrt{2(9.8)(588)}=107.4 m/s$

Learn more about kinetic energy and potential energy:

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3 years ago

What can be used to describe the quantitative data

Zepler [3.9K]

Quantitative data can be analyzed in a variety of different ways. In this section, you will learn about the most common quantitative analysis procedures that are used in small program evaluation.

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3 years ago

A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp th

aleksklad [387]

Answer:

The velocity is 30.279 m/s

Explanation:

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According to question, the semi-trailer coast along a ramp, which is inclined at an angle of 170, and to a distance of 160m to stop

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Applying principle of conservation of energy,

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Solving for v, we get $v^2$ = 2gh = 2*9.8*46.779 = 916.8684

$v^2$ = 916.8684

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