Q4 · 2022 · Paper 2Simple familiar5 marks
QUESTION 4 (5 marks)
A stationary object on a frictionless inclined plane is connected to a weight as shown.
Calculate the mass of the object on the inclined plane.
WORKED SOLUTION
5 marksQCAA guide · typeset solution
ANSWER
See worked solution below.
Worked solution
6
9.8
sin 35
15
9.8
5.
2
6
s
147
2
in
F
F
m g
A
B
A
m
m
g
B
A
A
m
A
m
θ =
×
×
°
=
×
=
=
=
Mass of object = 26 kg (to two significant figures)
• identifies equivalent forces acting parallel to the
plane [1 mark]
• recognises the scenario relates to
tensile force acting on the object on an inclined
plane [1 mark]
the component of force on the object acting down
the plane [1 mark]
• provides appropriate mathematical reasoning
[1 mark]
• calculates the mass of the object [1 mark]
One QCAA sample method typeset for web; criterion wording is adapted from the official marking guide.
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