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A pulley system has a velocity ratio 3. Draw a diagram showing the point of application and direction of load (L), effort (E) and tension (T). If lifts a load of 150 N by an effort of 60 N. Calculate its mechanical advantage. Is the pulley system ideal? Give reason.
A pulley system has a velocity ratio 3. Draw a diagram showing the point of application and direction of load (L), effort (E) and tension (T). If lifts a load of 150 N by an effort of 60 N. Calculate its mechanical advantage. Is the pulley system ideal? Give reason.
Class 10 | ICSE | Machines | Physics | Selina
A pulley system has a velocity ratio 3. Draw a diagram showing the point of application and direction of load (L), effort (E) and tension (T). If lifts a load of 150 N by an effort of 60 N. Calculate its mechanical advantage. Is the pulley system ideal? Give reason.

Solutions:

According to the question, Load is 150 N and Effort is 60 N

Using the expression of Mechanical advantage, we have

M.A. = Load / Effort = 150 / 60

M.A. = 2.5

The M.A. should be equal to n in an ideal instance, where n is the number of pulleys in the pulley system. The pulley system is not ideal in this scenario since the mechanical advantage is less than 3 (i.e. the number of pulleys).

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