Activity 1: Bouyancy

is the tendency of a body to float in a fluid

Buoyancy

An object that is completely or partially immersed in a fluid (liquid or gas) at rest is acted upon by an upward force which is called ______.

buoyant force

the weight of the fluid displaced by the body is ____ to the buoyant force.

equal

What is B?

buoyant force

What is g?

gravitational acceleration

What if Wfd?

weight of the fluid displaced

What is pf?

density of the fluid

What is Vfd?

the volume of the displaced fluid

What are the materials/equipments in Activity 1?

• 100 mL graduated cylinders

• beaker

• steel mass

• spring balance

• meter string

• plastic container

• water

• brine

• alcohol

• triple beam balance

The force is usually measured in?

Newtons

What tool is used to measure the force exerted on an object?

spring balance

A boat floating in fresh water displaces 35.6 kN of water. What is the buoyant force acting on the boat?

35.6 kN

A boat floating in fresh water displaces 35.6 kN of water. What happens to the volume of the water displaced if the boat were floating in salt water? (Psw = 1024 kg/m³)

The volume of displaced water must decrease to keep the equation balanced.

Based on the gathered in Table 1.7.1, how does the density of the fluid affect the buoyant force acting on the steel mass?

the higher the density of fluid, the greater the buoyant force acting on steel mass