Featured in PASCO’s Advanced Physics Teacher Guide

Advanced Physics Teacher Guide

(PS-2879C)

This manual features over 30 College Board curriculum and AP Physics exam inspired lab activities.

Buoyant Force

Lab Summary

Use a force sensor to measure the weight and gauge pressure on a metal cylinder in water as it is slowly submerged.

Theory

A metal cylinder is lowered into water by equal increments. Design and conduct an experiment that will measure the weight and gauge pressure on the metal cylinder in water as it is slowly submerged.

  • Determine the buoyant force on an object when partially or completely submerged in a fluid.
  • Determine the difference in hydrostatic pressure on an object when partially or completely submerged in a fluid.
  • Discover the relationship between Archimedes' principle and hydrostatic pressure in objects submerged in a fluid.

Method

Students gain experience conducting the following procedures:

  • Hanging and lowering a metal cylinder into water by equal increments and measuring its weight at each increment until the entire cylinder is submerged.
  • Determining and recording the gauge pressure on the cylinder due to the water.
  • Determining and recording the force due to the pressure.
  • Determining the volume and weight of the water displaced by the submerged cylinder.
  • Comparing and analyzing the results from each method.

Sensors / Equipment Used:

PASPORT Force Sensor

(PS-2104)

Designed to measure both pulling and pushing forces. Uses range from collisions to tug-of-war.

Density Set

(ME-8569A)

Investigate density by Archimedes' principle of displacement, specific heats and basic length/volume relationships.

Base and Support Rod

(ME-9355)

The Large Base and Support Rod includes built-in leveling screws and an aluminum rod that is 12.7 mm (1/2 in.) in diameter and 45 cm long.

Right Angle Clamp

(SE-9444)

This clamp fits rods up to 18 mm (11/16 in) in diameter.

Materials Used:

Beaker, glass with graduations, 500-mL
Meter Stick 
Pen, black marker 
Small Rod 
String - 10 cm
Water ~ 400 mL

The Associated Bundle:

Advanced Physics Standard Sensor Bundle

(PS-2932B)

This bundle contains the probeware needed to perform all 37 lab activities in the Advanced Physics lab manual.

Interface Required

This experiment may require software and an interface for data collection.