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?
Answers
Answers :-
1.
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. That's because a machine doesn't change the amount of work and work equals force times distance.
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.
We tend to think love occurs solely between romantic partners, but this isn't true. Humans can experience eight types of love in various relationships, such as with romantic partners, friends, family and even strangers on the street.
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 consisting of 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 output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent. Some of the force applied to moving the furniture must be used to overcome the friction with the ramp.
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.
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Answer:
machine have to be maintaining