Question

Draw a diagram of a pulley system of velocity ratio 4. Calculate its mechanical advantage if its efficiency is 90%.

Answer 1

Explanation:

hence it is right then above one...

Answer 2

Answer:

3.6

Explanation:

Given:

Efficiency = 90%

To find: Mechanical advantage

Solution:

The load is the resistance that a machine must overcome, and the effort is the force that is delivered to the machine in order to overcome the load. The ratio of the work performed on a load by the machine to the work performed on the machine by the effort is known as the machine's efficiency.

Pulley system analysis using the velocity ratio of 4

The pulley system's velocity ratio is V.R = 4.

The velocity ratio is the ratio of load-displacement to effort displacement.

The number of tackle strands or the portion of the string supporting the load is always equal to the velocity ratio.

The mechanical advantage is the result of its efficiency η

 and velocity ratio.

$M.A=$η×$V.R$

Now equating the value,

$M.A=90%$%×$4$

= $\frac{90}{100}$×4 = 3.6

The diagram of the pulley is given below,

A pulley system has a velocity ratio 5. Draw a neat labelled diagram of the pulley system to lift a load by applying the effort in a convenient direction. Mark the tension in your diagram. (i) (ii) Question 6 (a) If the efficiency of the system is 80% find its mechanical advantage. If a load of 10 kgf is pulled up by a distance of 2 m in 10 s, calculate the power developed by the effort (given g = 10 m s-2).

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Find the value of velocity ratio of a pulley system having AMA less than 2.​

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