if spherical balls of radius 1mm,3mm,5mm,7mmand 9mmof same material dropped in a liquid by using suitable formula prepare a table for their terminal velocity assuming terminal velocity of first to be x. in physics class 11
Answers
Answered by
0
Answer:
Stoke's Law states,
Frictional force on a spherical object of radius R due to viscous medium of coefficient of viscosity η=6πηRv
where v is the instantaneous velocity of the object.
Thus f∝R
f∝v
Answered by
0
Answer:
As the velocity of the ball remains unchanged in the water which implies that the ball reached its terminal velocity in water,(just before touching the water)
V=
9η
2r
2
(T
s
−T)g
=
9×10
−3
2(10
−3
)×10×(10
4
−10
3
)
=20m/s
Neglecting the viscous effect of air,
We calculate the distance covered by the ball to reach the velocity of 20m/s
V
2
−V
2
=2aS
⇒(20)
2
=2×10×h
⇒
20
400
=h⇒h=20m.
Similar questions