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2 years ago

What is the mechanical advantage of a pulley?

Physics

2 answers:

STatiana [176]2 years ago

3 0

<span>the mechanical advantage of a pulley is 1.0

</span>

Ann [662]2 years ago

3 0

Answer:

Mechanical advantage is the ratio of the load and effort.

Mechanical advantage of a pulley is 1.

Explanation:

A pulley system will help in reducing the effort when lifting a load. If more pulleys are used, less effort force is required, making the lifting easy.

When only one pulley is used to lift a load, the mechanical advantage is 1.

If the number of pulleys used are increased, less effort can be applied, as the mechanical advantage increases.

The mechanical advantage is equal to the number of ropes passing over the pulley or pulleys to which the load is attached.

The rope along which the effort is applied is not counted.

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Answer:

28.5 m/s

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Explanation:

h = 20 m, R = 20 m, theta = 53 degree

Let the speed of throwing is u and the speed with which it strikes the ground is v.

Horizontal distance, R = horizontal velocity x time

Let t be the time taken

20 = u Cos 53 x t

u t = 20/0.6 = 33.33 ..... (1)

Now use second equation of motion in vertical direction

h = u Sin 53 t - 1/2 g t^2

20 = 33.33 x 0.8 - 4.9 t^2 (ut = 33.33 from equation 1)

t = 1.17 s

Put in equation (1)

u = 33.33 / 1.17 = 28.5 m/s

Let v be the velocity just before striking the ground

vx = u Cos 53 = 28.5 x 0.6 = 17.15 m/s

vy = uSin 53 - 9.8 x 1.17

vy = 28.5 x 0.8 - 16.66

vy = 6.14 m/s

v^2 = vx^2 + vy^2 = 17.15^2 + 6.14^2

v = 18.22 m/s

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Suppose you want to determine the resistance of a resistor that is nominally 100 . You should be able to apply 10 V across the r

Butoxors [25]

Answer:

a) For y = 102 mA, R = 98.039 ohms

For y = 97 mA, R = 103.09 ohms

b) Check explanatios for b

Explanation:

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b) $y = \left[\begin{array}{ccc}y_{1} &y_{2} \end{array}\right] ^{T}$

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$x = \left[\begin{array}{ccc}100\end{array}\right]$

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