Question

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Answer 1

Explanation:

a. Forces acting on the metal sphere are :-

1. Gravitational force (mg) due to the weight of the sphere (vertically downward).
2. Force of buoyancy due to the castor oil (vertically upward).
3. Viscous Force due the castor oil (vertically downward)

b. When all the forces are balanced, then the velocity attained by the metal sphere is known as Terminal velocity.

c. ans in pic