Draw a diagram of a block and tackle system of pulleys having a velocity ratio of 5. In your diagram indicate clearly the points of application and the directions of the load L and effort E. Also mark the tension T in each strand.

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Q. Draw a diagram to show a block and tackle pulley system having a velocity ratio of

3

marking the direction of load(L), effort(E) and tension(T).

Q. A block and tackle system of pulleys has a velocity ratio

4

.
(i) Draw a labelled diagram of the system indicating clearly the points of application and direction of load and effort.
(ii) What is the value of the mechanical advantage of the given pulley system if it is an ideal pulley system?

A block and tackle system has the velocity ratio 3. Draw a labelled diagram of the system indicating the points of application and the directions of load L and effort E. A man can exert a pull of 200 kgf. (a) What is the maximum load he can raise with this pulley system if its efficiency is $60 %$ ? (b) If the effort end moves a distance 60 cm, what distance does the load move ?

Q. Draw a combination of three movable pulleys with a fixed pulley showing the directions of load, effort and tension in each strand. Find velocity ratio.

You are given four pulleys and three strings. Draw a neat and labelled diagram to use them so as to obtain a maximum mechanial advantage equal to 8. In your diagram mark the directions of load L, effort E and tension in each strand.

What assumptions have you made to obtain the required mechanical advantage ?

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Block and Tackle System

Standard X Physics

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