(a) Draw a diagram of a pulley system of velocity ratio 4. Calculate its mechanical advantage, if its efficiency is 90%.
(b) Why does a rope walker hold a long pole in his hands? Explain.

Question

(a) Draw a diagram of a pulley system of velocity ratio 4. Calculate its mechanical advantage, if its efficiency is 90%. (b) Why does a rope walker hold a long pole in his hands? Explain.

KnowledgeBoat · Accepted Answer

(a) Diagram of a pulley system of velocity ratio 4 is shown below:  Given, Efficiency (η) = 90% Velocity ratio = 4 MA = ? We know, Substituting in the formula above we get, MA = 0.90 x 4 = 3.6 Hence, MA = 3.6 N (b) The pole increases the walker's moment of inertia or resistance to rotating and prevents him from falling off the wire, allowing the walker time to correct his position and stay balanced. When he feels he is falling towards right, he shifts the pole towards left and vice versa. In addition, holding the pole low helps to keep his center of gravity low, and this further increases his ability to balance.

Physics

(a) Draw a diagram of a pulley system of velocity ratio 4. Calculate its mechanical advantage, if its efficiency is 90%.
(b) Why does a rope walker hold a long pole in his hands? Explain.

Machines

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Physics

(a) Draw a diagram of a pulley system of velocity ratio 4. Calculate its mechanical advantage, if its efficiency is 90%.(b) Why does a rope walker hold a long pole in his hands? Explain.

Machines

Related Questions

Shyam is trying to balance a meter rod on his finger as shown in the diagram. Two weight 50 gf and 200 gf at 40 cm and 95 cm respectively and his finger at 70 cm.Find the anti-clock wise moment and clockwise moment.(b) Find the weight of meter rod.

(a) A truck and a car are running with the same speed on a highway. If the ratio of the kinetic energies is 25 : 12, then what is the ratio of their masses?(b) Give two examples in which mechanical energy is conserved.

(a) Draw a diagram of a pulley system of velocity ratio 4. Calculate its mechanical advantage, if its efficiency is 90%.
(b) Why does a rope walker hold a long pole in his hands? Explain.

Shyam is trying to balance a meter rod on his finger as shown in the diagram. Two weight 50 gf and 200 gf at 40 cm and 95 cm respectively and his finger at 70 cm.
Find the anti-clock wise moment and clockwise moment.
(b) Find the weight of meter rod.

(a) A truck and a car are running with the same speed on a highway. If the ratio of the kinetic energies is 25 : 12, then what is the ratio of their masses?
(b) Give two examples in which mechanical energy is conserved.