The efficiency of a Wheel and Axle is 75%. What does it mean?

Answer:

The efficiency of a wheel and axle is 75%. This means that the wheel and axle can convert 75% of our applied effort into useful work and the rest 25% is lost to overcome other resisting factors such as frictional force, etc.

The efficiency of a wheel and axle is 60%. What does it mean?

Answer: It means that the wheel and axle can only convert 60% of our applied effort into useful work and the rest 40% is lost during the machine operation.

The MA of a wheel and axle is 2. What does it mean?

Answer: The MA of a wheel and axle is 2. This means that the machine can multiply our applied effort by 2 times.

The VR of a wheel and axle is 3. What does it mean?

Answer: The VR of a wheel and axle is 3. This means that the applied effort travels 3 times the distance to that the load covers in equal time.

This is a very important topic of discussion from Simple Machine Chapter of Class 9 from Physics portion of Science subject.

Wheel and Axle is a simple machine consisting of two co-axial cylinders in which one has a bigger radius and the other has a smaller radius. The bigger one is called a wheel and the smaller one is called axle.

Since, Wheel and Axle is a simple machine, its efficiency can be measured. The efficiency of all simple machines are less than 100%. This is because no simple machines are ideal in practical use.

For every simple machines, the efficiency of that machine is its actual performance in daily use.

Efficiency is the amount of useful work that the machine can convert when it is operated.

The efficiency is never equal to 100% because the applied effort is lost to overcome the resisting factors. These factors generate when the machines are operated.

Since, frictional force is a force that is generated when two surfaces slide against one another. Frictional force affects the total efficiency of a machine as the effort is lost to overcome the frictional force.

Similarly, heat and other factors that are generated in a simple machine affect the total efficiency of the machine.

FAQs:

Derive P=hdg.
Why is wheel and axle called a continuous lever?

Useful Study Materials:

Class 9 Simple Machine Notes

CLASS 9 FREQUENTLY ASKED QUESTION FROM CHAPTER 3 SIMPLE MACHINE. EFFICIENCY OF A SIMPLE MACHINE IS 75%. ELABORATE THIS STATEMENT. JUSTIFY THIS STATEMENT. WHAT DOES IT MEAN. CLASS 9 PHYSICS.

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The efficiency of a Wheel and Axle is 75%. What does it mean? | Physics | FAQs