Machines

Question 1

Give the functions and uses of simple machines

Answer 1

1. In lifting a heavy load by applying less effort, i.e., as a force multiplier
2. In changing the point of application of effort to a convenient point
3. In changing the direction of effort to a convenient direction
4. For obtaining a gain in speed (a greater movement of load by a smaller movement of effort)

Question 2

Give the formula for gain in speed

Answer 2

Gain in speed = 1/VR

Question 3

Define a machine

Answer 3

A machine is a device by which we can either overcome a large resistive force (or load) at some point by applying a small force (effort) at a convenient point and in a desired direction or by which we can obtain a gain in speed