Advertisements
Advertisements
Question
With reference to the terms mechanical advantage, velocity ratio and efficiency of a machine, name and define the term that will not change for the machine of a given design.
Advertisements
Solution
The term is Velocity Ratio (V.R.).
Velocity ratio of a machine is the ratio of the distance moved by the effort to the distance moved by the load in the same time.
`V.R = "Distance moved by effort"
/"Distance moved by load"`
For a machine of a given design, the velocity ratio remains constant.
RELATED QUESTIONS
What is the principle of an ideal machine?
Two forces each of 5N act vertically upwards and downwards respectively on the two ends of a uniform metre rule which is placed at its mid-point as shown in the diagram. Determine the magnitude of the resultant moment of these forces about the midpoint.
Draw a diagram to show how a single pulley can be used so as to have its ideal M.A= 2.
State four ways in which machines are useful to us.
Name a machine to change the point of application of force ?
Mechanical advantage (M.A.), load (L) and effort (E) are related as ______.
A force of 5 kgf is required to cut a metal sheet. A pair of shears used for cutting the metal sheet has its blades 5 cm long, while its handles is 10 cm long. What effort is needed to cut the sheet?
What is the purpose of a machine?
Complete the following sentence :
A scissors is a ___________ multiplier.
Mention the advantages of using a machine.
