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Question
Explain the term mechanical advantage.
Solution
The ratio of the load to the effort is called the mechanical advantage of the machine.
Mechanical advantage (M.A.) = `("Load" ("L"))/("Effort" ("E"))`
RELATED QUESTIONS
Define the term velocity ratio.
Define the term efficiency of a machine.
When does a machine act as (a) a force multiplier, (b) a speed multiplier? Can a machine act as a force multiplier and a speed multiplier simultaneously?
- State the relationship between mechanical advantage, velocity ratio and efficiency.
- Name the term that will not change for a machine of a given design.
Draw a diagram to illustrate the position of fulcrum load and effort, in the following:
A common balance
Figure below shows a wheel barrow of mass 15 kgf carrying a load of 30 kgf with its centre of gravity at A. The points B and C are the centre of wheel and tip of the handle such that the horizontal distance AB = 20 cm and AC = 40 cm.
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- the mechanical advantage of fire tongs and
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A machine works as a
- force multiplier,
- speed multiplier.
In each case, state whether the velocity ratio is more than or less than 1.
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Mechanical advantage = ______ × velocity ratio.
