3 years ago

what is the mechanical advantage of a machine that uses an input force of 20 newtons to achieve an output force of 60 newtons

1 answer:

inn [45]3 years ago

4 0

The answer to your question will be 3.

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salantis [7]

Answer:

Explanation:

Given

Distance to grandmother's house=100 mi

it is given that during return trip Julie spend equal time driving with speed 30 mph and 70 mph

Let Julie travel x mi with 30 mph and 100-x with 70 mph

$\frac{x}{30}=\frac{100-x}{70}$

x=30 mi

Therefore

Julie's Average speed on the way to Grandmother's house $=\frac{100}{\frac{50}{30}+\frac{50}{70}}$

=42 mph

On return trip

$=\frac{100}{2\frac{30}{30}}=50 mph$

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alexandr402 [8]

Both don’t have units beacuse they are ratios

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sammy [17]

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