Physics
(i) 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).
(ii) The pulley system drawn lifts a load of 150 N when an effort of 60 N is applied. Find it's mechanical advantage.
(iii) Is the above pulley system an ideal machine or not?
Machines
ICSE 2018
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Answer
(i) The block and tackle pulley system with velocity ratio 3 is shown below in which the direction of load (L), effort (E) and tension (T) has been marked:
(ii) Given,
L = 150 N,
E = 60 N
Mechanical advantage M.A. = = = 2.5
(iii) This pulley system is not ideal.
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