Question

Answer in detail .Q1. How do simple machine achieve their purpose of making work easier and faster to perform?Q2.Write a note on lever and describe its mechanical advantage?Q3 . Discuss the various types of lovers?Q4. How does an inclined plane work as a simple machine ?Q5.Discuss the types of pulleys?Q6.Write short note on wheel and axle?Q7.Explain the efficiency of a machine. Why is the efficiency of a machine always less than 100%?Q8. Why is there a need to take care of machines ?How can we maintain our machines?​

Answer 1

$\huge\underline\bold\red{AnSwer :-}$

1 .Contrary to popular belief, machines do not increase the amount of work that is done. They just change how the work is done. Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied.

2 .A lever amplifies an input force to provide a greater output force, which is said to provide leverage. The ratio of the output force to the input force is the mechanical advantage of the lever. As such, the lever is a mechanical advantage device, trading off force against movement.

3 .Irrelevant question

4 .An inclined plane is a simple machine that consists of a sloping surface connecting a lower elevation to a higher elevation. It is used to move objects more easily to the higher elevation. Less force is needed to move an object uphill with an inclined plane, but the force must be applied over a greater distance.

5 .There are three main types of pulleys: fixed, movable, and compound. A fixed pulley's wheel and axle stay in one place. A good example of a fixed pulley is a flag pole: When you pull down on the rope, the direction of force is redirected by the pulley, and you raise the flag.

6. The wheel and axle is a machine consistingwof a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other. ... It can amplify force; a small force applied to the periphery of the large wheel can move a larger load attached to the axle.

7 .The percentage of the work input that becomes work output is the efficiency of a machine. Because there is always some friction, the efficiency of any machine is always less than 100 percent. The efficiency of a machine indicates how well its input energy is converted to useful output energy or work. It is a major factor in the usefulness of a machine and is the fraction or percentage of the output divided by the input.

8 .Proactive maintenance is the key to anticipating when there will be a problem with the machine (and being able to take action to avoid inconvenient breakdowns or repair costs in the future). To prevent costly issues from happening, it's important to organise routine services on your machine or equipment.