Simple machines questions | form two Physics

Define the following:

1. Mechanical advantage
2. Velocity ratio
3. Efficiency of a machine

Answer / Solution

UNSOLVED

A simple machine was used to raise a load weighing 1000 N through a height of 5 m by applying an effort of 450 N. If the distance moved by the effort was found to be 25 m,
find:

1. Mechanical advantage
2. Velocity ratio
3. Efficiency of the machine

Answer / Solution

UNSOLVED

A machine has a velocity ratio of 15. If an effort of 10 N is applied to lift a load of 50 N, its efficiency is approximately equal to:
A. 20%
B. 33%
C. 50%
D. 75%

Answer / Solution

UNSOLVED

(a) Define the term “simple machine”.

(b) Write down the velocity ratio of the following simple machines:
(i) Inclined plane
(ii) A pulley system

(c) Why must a liquid and not a gas be used as fluid in a hydraulic machine?

Answer / Solution

UNSOLVED

A lever which has its fulcrum between the effort and the load is said to be of

1. first class
2. second class
3. third class
4. no class

Answer / Solution

UNSOLVED