A solid cylinder is lifted out of oil by a wire attached to a motor. Fig. 5.1 shows two different positions X and Y of the cylinder during the lifting process.
[Figure 5.1]
The motor is fixed to an overhead beam.
The cylinder has cross-sectional area 0.018m², length 1.2m and weight 560 N.
The density of the oil is 940kgm⁻³.
Throughout the lifting process, the cylinder moves vertically upwards with a constant velocity of 0.020 m s⁻¹. The viscous force of the oil acting on the cylinder is negligible.

Q: What topic does this question test?

This question tests Forces, density and pressure in A-Level Physics (syllabus code 9702). It is worth 11 marks.

Q: Which exam paper is this question from?

This question appeared in the Cambridge A-Level Physics May/June 2018 examination, Paper 2 Variant 2 (9702_s18_qp_22.pdf).

Question

A solid cylinder is lifted out of oil by a wire attached to a motor. Fig. 5.1 shows two different positions X and Y of the cylinder during the lifting process.
[Figure 5.1]
The motor is fixed to an overhead beam.
The cylinder has cross-sectional area 0.018m², length 1.2m and weight 560 N.
The density of the oil is 940kgm⁻³.
Throughout the lifting process, the cylinder moves vertically upwards with a constant velocity of 0.020 m s⁻¹. The viscous force of the oil acting on the cylinder is negligible.

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