Forces and motion

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Question 58

A student investigates a set of three solid polymer spheres sinking through a vertical cylinder filled with a highly viscous oil.

the apparatus consists of a glass column containing oil of depth $cm120\text{ cm}$
three spheres of different masses, designated X, Y, and Z, are released one at a time from the top surface of the oil
the time taken to descend to the bottom of the column is recorded

The student uses the following method:

measure the mass of sphere X
release sphere X from the surface of the oil
record the time taken for sphere X to travel the $cm120\text{ cm}$ distance
repeat the test two more times

The student uses the same method for spheres Y and Z.

The table shows the student's results:

Sphere	Mass in $g\text{g}$	Time in $s\text{s}$ : Test 1	Time in $s\text{s}$ : Test 2	Time in $s\text{s}$ : Test 3
X	$35.0$	$7.8$	$8.2$	$8.0$
Y	$22.4$	$15.2$	$4.1$	$14.8$
Z	$15.8$	$12.1$	$11.9$	$12.0$

One of the time measurements in the table is anomalous. Identify this measurement.

[1]

State the relationship between average speed, distance moved, and time taken.

[1]

Calculate the average (mean) speed for sphere Y.

[2]

Explain what type of graph the student should use to present their data.

[1]

Before carrying out the investigation, the student made this prediction:

'The greater the mass of the sphere, the faster it sinks through the viscous oil.'

Discuss whether the student’s results support this prediction.

[4]

Forces and motion

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

Question 58

A student investigates a set of three solid polymer spheres sinking through a vertical cylinder filled with a highly viscous oil.

the apparatus consists of a glass column containing oil of depth $cm120\text{ cm}$
three spheres of different masses, designated X, Y, and Z, are released one at a time from the top surface of the oil
the time taken to descend to the bottom of the column is recorded

The student uses the following method:

measure the mass of sphere X
release sphere X from the surface of the oil
record the time taken for sphere X to travel the $cm120\text{ cm}$ distance
repeat the test two more times

The student uses the same method for spheres Y and Z.

The table shows the student's results:

Sphere	Mass in $g\text{g}$	Time in $s\text{s}$ : Test 1	Time in $s\text{s}$ : Test 2	Time in $s\text{s}$ : Test 3
X	$35.0$	$7.8$	$8.2$	$8.0$
Y	$22.4$	$15.2$	$4.1$	$14.8$
Z	$15.8$	$12.1$	$11.9$	$12.0$

One of the time measurements in the table is anomalous. Identify this measurement.

[1]

State the relationship between average speed, distance moved, and time taken.

[1]

Calculate the average (mean) speed for sphere Y.

[2]

Explain what type of graph the student should use to present their data.

[1]

Before carrying out the investigation, the student made this prediction:

'The greater the mass of the sphere, the faster it sinks through the viscous oil.'

Discuss whether the student’s results support this prediction.

[4]

Forces and motion

Question 58

Markscheme

Forces and motion

Question 58

Markscheme

Forces and motion

Question 58

Forces and motion Questions

Forces and motion

Question 58

Forces and motion Questions