Pankaj Bhatt Solutions for Chapter: Machines, Exercise 2: QUESTIONS

What effort is needed to lift a load of $100 \mathrm{kgf}$ from a single movable pulley (in $\mathrm{kgf}$)?

What is block and tackle system of pulleys? Draw a neat diagram to show block and tackle system of $5$ pulleys. Calculate mechanical advantage of this system.

Angle of deviation of an inclined plane is $30°$. If the increase in the potential energy of the load of $100 \mathrm{kgf}$  is $5000 \mathrm{J}$, how much distance it has moved on the plane?

A man applies the effort of $150 \mathrm{N}$ on one end of a fixed pulley to pull a bucket of water of mass $12 \mathrm{kg}$. What is the force of friction, mechanical advantage and efficiency of this pulley?

A gear system has one wheel with $15$ teeth and the other wheel with $60$ teeth. Calculate what gain in speed and the gain in torque you can obtain from this system.

The figure given below shows a system of four pulleys. The upper two pulleys are fixed, and lower two pulleys are movable. Draw a string around the pulleys. Mark the position of effort to be applied. What is the mechanical advantage of this system.

The figure given below shows a system of four pulleys. The upper two pulleys are fixed, and lower two pulleys are movable. Draw a string around the pulleys. Mark the position of effort to be applied. What is the velocity ratio of this system.

The figure given below shows a system of five pulleys.The upper three pulleys are fixed, and lower two pulleys are movable. Draw a string around the pulleys. Mark the position of effort to be applied. What is the velocity ratio of this system and mechanical advantage of this system?