Question

Give Answers In full method​

Answer 1

Explanation:

Q.7) Yes. for example angle has unit radians but is dimensionless.

Q.8) v = dx/dt =d/dt(6 + 18t + 9t² )

v = 18 + 18t

put t=2

v= 18 + 18 × 2

= 18 + 36

= 54

Q.9) nhi ata

I HOPE THIS WILL HELP YOU

Answer 2

Explanation:

no we can't hv a physical quantity with unit but no dimension.

x = 6 + 19t + 9t^2

$v = \frac{dx}{dt} = 18 + 18t$

when t = 2 , v = 18 + 36 = 54 m/s

9. 90°