Section 4. Forces, density and pressure for Physics, A Level - revisedeck

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4. Forces, density and pressure

A section of Physics, 9702

Listing 10 of 283 questions

An air bubble in a tank of water is rising with terminal velocity. The forces acting on the bubble are X, Y and Z, as shown...

9702_w22_qp_13

MCQ

2022

Paper 1, Variant 3

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A solid sphere, which is less dense than water, is held completely immersed in water a few metres below the surface. The density of the water is uniform. The sphere is released. Immediately after release, the sphere rises. Which row describes the changes in the magnitudes of the upthrust on the sphere and the resultant force on the sphere as it rises?

9702_w24_qp_11

MCQ

2024

Paper 1, Variant 1

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State what is meant by a vector quantity. A sphere falls vertically through a liquid that has density 830 kg m–3. The sphere has radius r and constant velocity v, as shown in . liquid sphere, radius r v The drag force D acting on the sphere is given by D = 6πrηv where η is a property of the liquid. Determine the SI base units of η. SI base units State an equation showing the relationship between the magnitudes of the weight W, drag force D and upthrust U acting on the sphere. The volume of the sphere is 4.6 cm3. The drag force D is 0.32 N. Calculate the weight of the sphere. weight = N

9702_w24_qp_22

THEORY

2024

Paper 2, Variant 2

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Questions Discovered

283