3 years ago

How do simple machines magnify forces?

Physics

1 answer:

olganol [36]3 years ago

3 0

Answer:

Motion at one end of the beam results in motion at the other end in the opposite direction.

Explanation:

The location of the fulcrum can magnify (or reduce) the force applied at one end at the expense (or advantage) of the distance over which the other end travels. Sorry if I get this wrong! I am in 5th grade. ♥

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A ball is dropped from the roof of a 25-m-tall building. What is the velocity of the object when it touches the ground? Suppose

Wewaii [24]

Answer:

a) $h=25m$

b) $v=19.8m/sec$

Explanation:

From the question we are told that:

Height $h=25m$

Bounce Height $h'=20m$

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$h=\frac{V^2}{2g}\\\\h=\frac{22.1^2}{2*9.81}$

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3 years ago

A stone initially moving at 8.0 m/s on a level surface comes to rest due to friction after it travels 11 m. What is the coeffici

Ivenika [448]

Answer:

Coefficient of friction will be 0.296

Explanation:

We have given initial speed of the stone u = 8 m /sec

It comes to rest so final speed v = 0 m /sec

Distance traveled before coming to rest s = 11 m

According to third equation of motion

$v^2=u^2+2as$

So $0^2=8^2+2\times a\times 11$

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We know that acceleration is given by

$a=\mu g$

So $2.90=9.8\times \mu \\$

$\mu =\frac{2.9}{9.8}=0.296$

So coefficient of friction will be 0.296

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3 years ago