Question

which of the following is the primary force acting on a floating object?
a magnetism
b buoyancy
c tension
d torsion

Explanation:

To determine the primary force on a floating object, we analyze each option:

• Option A (magnetism) acts on magnetic materials, not related to floating.
• Option B (buoyancy) is the upward force exerted by a fluid on a submerged or floating object, balancing weight for floating.
• Option C (tension) is a pulling force, e.g., in ropes, not for floating.
• Option D (torsion) involves twisting, irrelevant to floating. So buoyancy is the primary force.

Answer:

B. buoyancy