# 9 - Dimensional Analysis Questions Answers

**Asked By: KHUSHBOO AGGARWAL**4 year ago

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A man walks over a rough surface. The angle between the force of friction and the instantaneous velocity of the man is-

A. π

B. π/2

C. Zero

D. 2π

**Asked By: VIKAS**5 year ago

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A man walks over a rough surface. The angle between the force of friction and the instantaneous velocity of the man is-

**A. ** π

B. π/2

C. Zero

D. 2π

**Asked By: VIKAS**5 year ago

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rain is falling down vertically 2m/s. a person is walking with velocity 2m/s on horizantal road. the angle made by the umbrella with vertical to protect from rain is

**Asked By: VISHISTA**5 year ago

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**Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

In equation y = x^{2} cos^{2} 2π (βγ/α) , the units of x, α , β are m , s^{-1} ans (ms^{-1})^{-1} respectively. The units of y and γ are ....?

**Asked By: SWATI KAPOOR**5 year ago

**Solved By: AKSHAY TIWARY**

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IF 2sin^{2}22^{0} = p+qcosθ, FIND SMALLEST POSITIVE VALUE OF θ, WHEN p=1 AND q = -1.

**Asked By: SARIKA SHARMA**7 year ago

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**Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

2sin^{2}22.5 = 1- cos45 = 1 + (-1)cos45

so θ = 45

what is the formula for hole mobility in a semiconductor. ( not dimensional formula ,that i will find myself)

**Asked By: SARIKA SHARMA**7 year ago

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**Answer Strategies and trick by Manish sir**(it will help you to solve it by yourself)

hole mobility = velocity of hole/electric field applied

the force acting on a particle varies with displacement a/c to relatn F=ax^{1/2} +bsin (kx+o)

then which of the following expressn is meaningful?

1) F+b

2) (a^{2}/kb) +o

3) a+b

4)( a/b) +o

**Asked By: SARIKA SHARMA**7 year ago

**Solved By: NIKHIL VARSHNEY**

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Q WHICH SET CAN'T ENTER INTO THE LIST OF FUNDAMENTAL QUANTITIES IN ANY SYSTEM

a) lenth, mass, velocity

b)lenth, time,velocity

c) mass, time, velocity

d)lenth, time,mass

OPTn B IS CORRECT BUT I WANT TO KNOW THE REASON

**Asked By: SARIKA**7 year ago

**Solved By: NIKHIL VARSHNEY**

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