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Q: Upthrust force and weight of object would be-
  • A. In the below direction
  • B. In the opposite direction
  • C. Up above
  • D. In the same direction
Correct Answer: Option B - The upward buoyant force that is exerted on a body immersed in a fluid, whether partially or fully submerged, is equal to the weight of the fluid that the body displaced and acts in the upward direction at the center of mass of the displaced fluid. In this condition the Upthrust force (bouyant force) and the weight of the object would be in the opposite direction.
B. The upward buoyant force that is exerted on a body immersed in a fluid, whether partially or fully submerged, is equal to the weight of the fluid that the body displaced and acts in the upward direction at the center of mass of the displaced fluid. In this condition the Upthrust force (bouyant force) and the weight of the object would be in the opposite direction.

Explanations:

The upward buoyant force that is exerted on a body immersed in a fluid, whether partially or fully submerged, is equal to the weight of the fluid that the body displaced and acts in the upward direction at the center of mass of the displaced fluid. In this condition the Upthrust force (bouyant force) and the weight of the object would be in the opposite direction.