Physics
A block and tackle system has 5 pulleys. If an effort of 1000 N is needed in the downward direction to raise a load of 4500 N,
Calculate —
(a)The mechanical advantage,
(b)The velocity ratio and,
(c)The efficiency of the system.
Related Questions
In a block and tackle system consisting of 3 pulleys, a load of 75 kgf is raised with an effort of 25 kgf.
Find —
(i) the mechanical advantage,
(ii) the velocity ratio, and
(iii) the efficiency.
A single fixed pulley and a movable pulley both are separately used to lift a load of 50 kgf to the same height. Compare the efforts applied in an ideal situation.
In figure draw a tackle to lift the load by applying the force in the downward direction.
(a) Mark in the diagram the direction of load L and effort E.
(b) If the load is raised by 1 m, through what distance will the effort move?
(c) State the number of strands of tackle supporting the load.
(d) What is the mechanical advantage of the system?
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).
It lifts a load of 150 N by an effort of 60 N.
Calculate its mechanical advantage.
Is the pulley system ideal? Give reason.