GCSE AQA Physics Pressure & Pressure Differences in Fluids: A student dropped a piece of mod

Question

A student dropped a piece of modelling clay into oil.
Figure 1 shows the modelling clay just before it was dropped into the oil.

Figure 1

Modelling clay

Oil

Measuring cylinder

What was the distance fallen by the modelling clay?
Tick (✓) one box.

from A to C
from B to C
from A to D
from B to D

The student dropped four pieces of modelling clay, each with a different shape.
For each piece the student measured the time taken to fall the same distance through the oil.
The student removed each piece of modelling clay from the oil before dropping the next piece.

Suggest one reason why.

The student repeated the measurements and calculated mean values.
Table 1 shows the results.

Table 1

Shape         | Time taken in seconds |    
              | Drop 1 | Drop 2 | Drop 3 | Mean  
--------------|--------|--------|--------|-------
Sphere        |   47   |   38   |   41   |  42   
Cube          |   68   |   49   |   57   |   58  
Cylinder      |   34   |   37   |   34   |   X   
Cone          |   29   |   23   |   26   |   26

Calculate value X in Table 1.

Each piece of modelling clay had the same mass.
Which shape in Table 1 had the smallest resistive force acting against it as it fell?
Tick (✓) one box for your answer.

Cone
Cube
Cylinder
Sphere

Give one reason for your answer.

How would the time taken to fall change if the modelling clay was dropped through air instead of through oil?
Tick (✓) one box.

Time through air would be less.
Time through air would be more.
Time through air would be the same.

The mass of a piece of modelling clay was 0.050 kg.
gravitational field strength = 9.8 N/kg
Calculate the weight of the piece of modelling clay.
Use the equation:
weight = mass x gravitational field strength

Weight = _____ N

Weight causes the modelling clay to fall through the oil.
Weight is a non-contact force.
Which of the following are also non-contact forces?
Tick (✓) two boxes.

Air resistance
Electrostatic force

A student dropped a piece of modelling clay into oil - AQA - GCSE Physics - Question 1 - 2020 - Paper 1

Worked Solution & Example Answer:A student dropped a piece of modelling clay into oil - AQA - GCSE Physics - Question 1 - 2020 - Paper 1

What was the distance fallen by the modelling clay?

Suggest one reason why.

Calculate value X in Table 1.

Which shape in Table 1 had the smallest resistive force acting against it as it fell?

How would the time taken to fall change if the modelling clay was dropped through air instead of through oil?

Calculate the weight of the piece of modelling clay.

Which of the following are also non-contact forces?

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