A small metal sphere is falling through castor oil. Name the forces acting on the metal sphere.

A small metal sphere is falling through castor oil. Name the velocity of the sphere when the unbalanced force on it is zero

A small metal sphere is falling through castor oil. Which of these forces change? why?

A small metal sphere is falling through castor oil. Write down the expression for terminal velocity in terms of coefficient of viscosity.

When a metallic sphere falls through castor oil,its velocity becomes uniform,called terminal velocity. Rain drops falling under gravity do not acquire very high velocity.Why?

A metal sphere of density rho and radius 'a' is failing through an infinite column of liquid of density sigma and coefficient of viscosity eta . Name any two forces acting on the sphere.

The Earth moving round the sun in a circular orbit is acted upon by a force. Name the force acting on the Earth.