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  1. AP Physics 2
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What happens when the buoyant force is greater than the force of gravity?

The object floats.

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What happens when the buoyant force is greater than the force of gravity?

The object floats.

What happens when the buoyant force is less than the force of gravity?

The object sinks.

What happens when an object displaces a volume of fluid?

The fluid exerts an upward buoyant force on the object, equal to the weight of the displaced fluid.

What is the effect of increased depth on pressure in a fluid?

Pressure increases with depth, leading to a net upward buoyant force on submerged objects.

What happens when an object is fully submerged in a fluid?

The object experiences an apparent weight that is less than its true weight due to the buoyant force.

What are the differences between True Weight and Apparent Weight?

True Weight: The actual weight of an object (mgmgmg). | Apparent Weight: How heavy an object feels in a fluid (Fg−FbF_g - F_bFg​−Fb​).

Compare the conditions for floating and sinking.

Floating: Buoyant force is greater than the force of gravity (Fb>FgF_b > F_gFb​>Fg​). | Sinking: Buoyant force is less than the force of gravity (Fb<FgF_b < F_gFb​<Fg​).

What is the difference between mass and density?

Mass: The amount of matter in an object. | Density: Mass per unit volume (ρ=mV\rho = \frac{m}{V}ρ=Vm​).

How do you calculate Buoyant Force?

  1. Determine the volume of fluid displaced (VobjectV_{object}Vobject​). 2. Find the density of the fluid (ρfluid\rho_{fluid}ρfluid​). 3. Multiply these by the acceleration due to gravity (g): Fb=VobjectcdotρfluidcdotgF_b = V_{object} cdot \rho_{fluid} cdot gFb​=Vobject​cdotρfluid​cdotg.

How do you calculate Apparent Weight?

  1. Calculate the true weight (Fg=mgF_g = mgFg​=mg). 2. Calculate the buoyant force (FbF_bFb​). 3. Subtract the buoyant force from the true weight: Wa=Fg−FbW_a = F_g - F_bWa​=Fg​−Fb​.

What are the steps to determine if an object will float or sink?

  1. Calculate the buoyant force (FbF_bFb​). 2. Calculate the force of gravity (FgF_gFg​). 3. Compare FbF_bFb​ and FgF_gFg​: If Fb>FgF_b > F_gFb​>Fg​, it floats; if Fb<FgF_b < F_gFb​<Fg​, it sinks; if Fb=FgF_b = F_gFb​=Fg​, it is in equilibrium.