Draw a labelled sketch of a $class III$ lever. Give one example of this kind of lever.

Important Questions on Machines

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(A)>Q 2

The correct relationship between the mechanical advantage (M.A), the velocity ratio (V.R) and the efficiency (

η

) is:

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 1

State the term inclined plane? Also list down any two examples where it is used to raise a heavy load with less effort?

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 3

Write an expression for the mechanical advantage of an inclined plane if the terms of length and vertical height are given as l and h respectively.

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 4

State whether that the mechanical advantage of an inclined plane is equal to 1, less than 1 or greater than 1?

EASY

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 5

For a given height h, _____the length of the inclined plane, lesser will be the effort required.

MEDIUM

10th ICSE

IMPORTANT

Selina Icse Concise Physics For Class 10>Chapter 3 - Machines>EXERCISE-3(B)>Q 6

A box of mass $30 kg$ is to be raised from ground to a platform at P. A boy A does it by pushing the box along the slope QP of length $x$ , while another boy B does it by using the slope RP of length $y$ . Ignoring the force of friction, compare the work done by the boys A and B.

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