This video tutorial explains how to calculate the applied effort needed to lift a 5 kg load using a pulley system with 80% efficiency. It covers the concepts of mechanical advantage, velocity ratio, and efficiency, and demonstrates the calculations step-by-step. The tutorial concludes with the final answer and encourages viewers to subscribe for more educational content.

What is the mass of the load being lifted in the problem?

• 8 kg

• 5 kg

• 10 kg

• 3 kg

What is the efficiency of the pulley system used in the problem?

• 90%

• 80%

• 70%

• 60%

How is the load calculated in terms of Newtons?

• Mass * Distance

• Mass / Time

• Mass * Acceleration due to gravity

• Mass * Velocity

What is the velocity ratio for a single fixed pulley?

• 2

• 1

• 3

• 0.5

Which formula represents efficiency in this context?

• Efficiency = Velocity Ratio / Mechanical Advantage * 100

• Efficiency = Mechanical Advantage / Velocity Ratio * 100

• Efficiency = Load / Effort

• Efficiency = Effort / Load

What is the mechanical advantage if the load is 50 Newtons and the effort is unknown?

• Effort - Load

• Load * Effort

• Effort / Load

• Load / Effort

How is the effort calculated using cross multiplication?

• Effort = Load * Efficiency

• Effort = Load / Efficiency

• Effort = Load * Velocity Ratio

• Effort = Load / Velocity Ratio

What is the final calculated effort required to lift the load?

• 62.5 Newtons

• 50 Newtons

• 100 Newtons

• 75 Newtons

What is the reciprocal of 8/10 used in the calculation?

• 10/8

• 4/5

• 8/10

• 5/4

What is the final step in calculating the effort?

• Multiplying 25 by 2.5

• Subtracting 5 from 50

• Dividing 50 by 2

• Adding 10 to 50