Simple Machines

How are levers classified?

Describe the applications of lever with two examples.

Describe the applications of lever.

A resistance of $2000 \mathrm{N}$ is overcome by a machine of velocity ratio $5$ and efficiency $75\%$. Find the effort in newtons.

A resistance of $2000 \mathrm{N}$ is overcome by a machine of velocity ratio $5$ and efficiency $75\%$. Find M.A.?

Length of second order lever is $1 \mathrm{m}$ and load of $10 \mathrm{kgf}$ acting $60 \mathrm{cm}$ from the fulcrum is raised. What is the $\mathrm{M}.\mathrm{A}$?

Length of second order lever is $1 \mathrm{m}$ and load of $10 \mathrm{kgf}$ acting $60 \mathrm{cm}$ from the fulcrum is raised. What effort is needed in $\mathrm{kgf}$?

In a movable pulley (single moving pulley), the load is $100 \mathrm{N}$. Find the effort in newtons, if the efficiency is $100$ percentage.

In a movable pulley (single moving pulley), the load is $100 \mathrm{N}$. Find the mechanical advantage, if the efficiency is $100$ percentage.

Find out the simple machine used in the tongs.

Find out the simple machine used in the toaster handle.

Identify the class of lever. Identify the fulcrum of it.

Identify the class of lever. Identify the fulcrum of it.

Identify the class of lever. Identify the fulcrum of it.

Identify the class of lever. Identify the fulcrum of it.

Don't you see the use of a crowbar to reduce workload in the two situations in the pictures? Do you notice any change in the position of effort, fulcrum and resistance in the two situations?

Name the following:

A simple machine that reverses the action of force.

The name for a smaller wheel or rod of a giant wheel. (Axle/Inclined plane)

Name the fixed point around which a rigid bar rotates.

Name the following:

The lever in which the load is located between the fulcrum and the effort _____(class $1$ lever/ class $2$ lever/ class $3$ lever)