Question

You are going to submerge an iron block in different liquids (including water, vegetable oil

and washing up liquid) to see if the liquid affects the reading of weight on the forcemeter
Make a prediction about what you think will happen and explain why using science
 What was the force acting against the weight of the block when you submerged it in each
liquid?
 Which liquid produced the largest amount of this force?
 Which liquid produced the smallest amount of this force?
 Give a reason for your answers to questions 3 and 4.Think about what you know about
particlesYou are going to submerge an iron block in different liquids (including water, vegetable oil
and washing up liquid) to see if the liquid affects the reading of weight on the forcemeter
Make a prediction about what you think will happen and explain why using science
 What was the force acting against the weight of the block when you submerged it in each
liquid?
 Which liquid produced the largest amount of this force?
 Which liquid produced the smallest amount of this force?
 Give a reason for your answers to questions 3 and 4.Think about what you know about
particlesYou are going to submerge an iron block in different liquids (including water, vegetable oil
and washing up liquid) to see if the liquid affects the reading of weight on the forcemeter
Make a prediction about what you think will happen and explain why using science
 What was the force acting against the weight of the block when you submerged it in each
liquid?
 Which liquid produced the largest amount of this force?
 Which liquid produced the smallest amount of this force?
 Give a reason for your answers to questions 3 and 4.Think about what you know about
particles

Answer 1

• buoyant force
• largest: liquid soap
• smallest: vegetable oil
• densest liquid produces the most buoyant force

Step-by-step explanation:

Force Acting

When an object is submerged in a medium, it is subjected to a buoyant force equivalent to the force of gravity on the mass of the medium displaced. Thus, the force is greater if the mass of the medium is greater for a given displacement. More simply, the denser the medium, the greater the buoyant force.

Ranking of Forces

We have observed that vegetable oil floats on water, and that liquid soap sinks in water. This tells us that oil has a lower relative density than water or liquid soap, and that liquid soap has the highest density of these media.

Liquid soap is the most dense of the three liquids, so will produce the most buoyant force.

Vegetable oil is the least dense of the three liquids, so will produce the least buoyant force.