In class II lever, effort arm is ______ than the load arm.

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In class II lever, effort arm is longer than the load arm.

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Chapter 3 Machines
EXERCISE - 3 (A) | Q 40. (b) | Page 58

Explain the term mechanical advantage.

Define the term velocity ratio.

Define the term efficiency of a machine.

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 diagrams to illustrate the position of fulcrum load and effort, in the following:

A seesaw

Draw a diagram to illustrate the position of fulcrum load and effort, in the following:

A common balance

Draw a diagram to illustrate the position of fulcrum load and effort, in the following:

A nut cracker

Draw a diagram to illustrate the position of fulcrum load and effort, in the following:

Forceps

A machine works as a

In each case, state whether the velocity ratio is more than or less than 1.

Mechanical advantage = ______ × velocity ratio.