Advertisements
Advertisements
Question
Answer the following.
What do you understand by a complex machine?
Solution
Machines such as sewing machines or cars that have more than one moving part are called complex machines.
APPEARS IN
RELATED QUESTIONS
State if the following statement is true or false. Correct the statement if it is false.
There are four types of simple machines.
The correct relationship between the mechanical advantage (M.A.), the velocity ratio (V.R.) and the efficiency (n) is ______.
Write the relation between mechanical advantage, velocity ratio and efficiency.
Define Mechanical advantage
Fig. shows a spade. It is being used to lift soil weighing 30N from the ground.
(a) Mark the direction of the least force on the handle necessary to keep the spade balanced.
(b) Calculate the least force on the handle necessary to keep the spade balanced (the weight of the spade is negligible).
(c) If the left hand was move towards the soil on the spade, would the force on the handle necessary to keep the soil balance the greater or less? Give a reason for your answer.
(d) To which class of lever does the spade belong?
Give an example of the following use of a machine to change the point of application of the force.
Classify the following as a lever, a pulley and an inclined plane:
A slide
Classify the following as a lever, a pulley and an inclined plane:
Scissors
Which machine will you use to do the following work? Write their type.
To hold a papad for roasting it.
What is a lever? How are the orders of the lever determined?