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goblinko [34]
2 years ago
5

Mechanical efficiency is a comparison of a machines work output with the work input. True or False?

Physics
1 answer:
mr_godi [17]2 years ago
6 0
The answer to this question is true
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A 120 kg box is on the verge of slipping down an inclined plane with an angle of inclination of 47º. What is the coefficient of
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Given :

A 120 kg box is on the verge of slipping down an inclined plane with an angle of inclination of 47º.

To Find :

The coefficient of static friction between the box and the plane.

Solution :

Vertical component of force :

mg\ sin\ \theta =  120\times 10 \times sin\ 47^\circ{}=877.62 \ N

Horizontal component of force(Normal reaction) :

mg\ cos\ \theta =  120\times 10 \times cos\ 47^\circ{}=818.40 \ N

Since, box is on the verge of slipping :

mg\ sin\ \theta= \mu(mg \ cos\ \theta)\\\\\mu = tan \ \theta\\\\\mu = tan\ 47^o\\\\\mu = 1.07

Therefore, the coefficient of static friction between the box and the plane is 1.07.

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In this example we see how thermal expansion can actually throw off the accuracy of a length-measuring device—namely, a tape mea
Ulleksa [173]

Answer:

The new length is 50.00885m

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linear thermal expansion coefficient Fe 11.8e-6 /K

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New length = ( 50.000 + 0.00885)m =

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5 0
3 years ago
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A car is being driven down a level track with no net force on it. This motion is best described as
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A)Linear motion

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This passage best illustrates which reaction to multiculturalism?
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D

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