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Class 9

Explore popular questions from Motion for Class 9. This collection covers Motion previous year Class 9 questions hand picked by experienced teachers.

Motion

Correct Marks 1

Incorrectly Marks 0

Q 1. The basic unit of time is

A

an hour

B

a minute

a second

D

None of these

Correct Marks 1

Incorrectly Marks 0

Q 2. A person travelling on a strainght line moves with a uniform velocity {tex}v_1{/tex} for some time and with uniform velocity {tex}v_2{/tex} for the next equal time. The average velocity {tex}v{/tex} is given by : -

{tex}v=\frac{v_1+v_2}{2}{/tex}

B

{tex}v=\sqrt{v_1v_2}{/tex}

C

{tex}\frac{2}{v}=\frac{1}{v_1}+\frac{1}{v_2}{/tex}

D

{tex}\frac{1}{v}=\frac{1}{v_1}+\frac{1}{v_2}{/tex}

Explanation