R P Goyal and S S Shome Solutions for Chapter: Simple Machines, Exercise 1: TEST YOURSELF

Select the correct statement :

In a lever, fulcrum is at one end at a distance of $30 \mathrm{cm}$ from the load and effort is at the other end at a distance of $90 \mathrm{cm}$ from the load. Find :
the length of load arm.

In a lever, fulcrum is at one end at a distance of $30 \mathrm{cm}$ from the load and effort is at the other end at a distance of $90 \mathrm{cm}$ from the load. Find :
the length of effort arm.

In a lever, fulcrum is at one end at a distance of $30 \mathrm{cm}$ from the load and effort is at the other end at a distance of $90 \mathrm{cm}$ from the load. Find :
the mechanical advantage of the lever.

In a machine an effort of $10 \mathrm{kgf}$ is applied to lift a load of $100 \mathrm{kgf}$. What is its mechanical advantage?

The mechanical advantage of a machine is 5. How much load it can exert for the effort of $2 \mathrm{kgf}$?

The mechanical advantage of a machine is 2. It is used to raise a load of $15 \mathrm{kgf}$. What effort is needed?

A lever of length $100 \mathrm{cm}$ has effort of $15 \mathrm{kgf}$ at a distance of $40 \mathrm{cm}$ from the fulcrum at one end. What load can be applied at its other end?