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3 years ago

Which of these could NOT be used to find the mechanical advantage of an inclined plane?

2 answers:

kramer3 years ago

8 0

The first three would be needed. They take care of the fourth 1 (D). The input and output force and the efficiency are the standard ways of calculating Mechanical advantage for simple machines. The height and length of the inclined plane is taken into account by the input and output forces and the efficiency.

D is the answer.

german3 years ago

7 0

The answer is c because it has nothing to do with the input and output force

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A 2kg book is held against a vertical wall. The coefficient of friction is 0.45. What is the minimum force that must be applied

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We have that for the Question "A 2kg book is held against a vertical wall. The coefficient of friction is 0.45. What is the minimum force that must be applied on the book, perpendicular to the wall, to prevent the book from slipping down the wal" it can be said that the minimum force that must be applied on the book is

F=44N

From the question we are told

A 2kg book is held against a vertical wall. The coefficient of friction is 0.45. What is the minimum force that must be applied on the book, perpendicular to the wall, to prevent the book from slipping down the wal

Generally the equation for the Force is mathematically given as

$F=\frac{mg}{\mu}\\\\F=\frac{2*9.8}{0.45}\\\\$

F=44N

Therefore

the minimum force that must be applied on the book is

F=44N

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