Simple Machines

The amount of draft allowance provided on the exterior surface of the pattern is up to _____ per metre.
 

Write some places where an inclined plane helps.

What do you understand by load, effort and fulcrum?

What is a Lever in a simple machine?

How lever amplify the input force?

How does lever affect force?

Some machines have few parts these are _____ machines.

Pulley is a _____machine.

The piston rod of a water pump is $90 \mathrm{cm}$ long, and the handle is $90 \mathrm{cm}$ long. Calculate 

(a)  the handle's mechanical advantage if the pivot handle is $15 \mathrm{cm}$from the piston rod.

(b) the least effort necessary at the pivot handle's other end to overcome a resistance of $60 \mathrm{kgf}$.

Answer the following questions based on the given figure.

(a) Name the category of simple machine this object belongs to.

(b) Calculate mechanical advantage of this tool?

(c) Is the value calculated in part (b) is less than one? Discuss the importance of tool on the basis of result found in part (b).

Your family is shifting house and some crates are being loaded onto a truck. One of them slips and falls into a ditch. Which simple machine (or machines) will you use to get it out?

Discuss at least five uses of simple machines in our everyday life.

Look at the two pictures given below. Identify the image in which more energy has been used. Discuss.

Picture A	Picture B

A pair of tongs is an example of lever of _____ type.

A crowbar helps you to shift a heavy load faster.

Which is not a simple machine?

Simple machines make work convenient by changing the _____ of force.

Look at the pictures of some simple machines.

Tabulate the tasks made easier by these devices.

Which of the methods like using an axe, using a chopper, using the coconut husking device is most commonly used? Why?

 The simple machine makes work easier by reducing efforts.