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3 years ago

11

Apply 100.0 N. of forced to the machine the machine applies 20.0 in a force to the load what is the mechanical advantage of the

machine 200.0 80.0 5.00 0.200

1 answer:

Neporo4naja [7]3 years ago

3 0

$a = \frac{f2}{f1}$
$\frac{20}{100 } = 0.200$
a=advantage of the machine
f1=force that is applied
f2=force the machine applied

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Incomplete question as the mass of baseball is missing.I have assume 0.2kg mass of baseball.So complete question is:

A baseball has mass 0.2 kg.If the velocity of a pitched ball has a magnitude of 44.5 m/sm/s and the batted ball's velocity is 55.5 m/sm/s in the opposite direction, find the magnitude of the change in momentum of the ball and of the impulse applied to it by the bat.

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Given data

Mass m=0.2 kg

Initial speed Vi=-44.5m/s

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Required

Change in momentum ΔP

Solution

First we take the batted balls velocity as the final velocity and its direction is the positive direction and we take the pitched balls velocity as the initial velocity and so its direction will be negative direction.So we have:

$v_{i}=-44.5m/s\\v_{f}=55.5m/s$

Now we need to find the initial momentum

So

$P_{1}=m*v_{i}$

Substitute the given values

$P_{1}=(0.2kg)(-44.5m/s)\\P_{1}=-8.9kg.m/s$

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$P_{2}=mv_{f}\\P_{2}=(0.2kg)(55.5m/s)\\P_{2}=11.1kg.m/s$

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ΔP=P₂-P₁

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ΔP=20 kg.m/s

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