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IGCSE · 1 · multiple choice

Motion, forces and energy · Question 3

Motion, forces and energy · Original GioPhysics question with a detailed, mark-by-mark answer guide.

Demand
routine
Marks
1
Topics
1
Answer
Complete
Rectangular metal block with its three edge lengths marked5.0 cm3.0 cm2.0 cmmass = 240 g
Fig. 3.1An oblique drawing of a solid rectangular metal block. The front face is marked 5.0 cm along its lower edge and 3.0 cm up its left-hand edge, and the edge receding into the page is marked 2.0 cm. The block carries the label mass = 240 g.
multiple choice1 mark

A rectangular metal block measures 2.0 cm × 3.0 cm × 5.0 cm and has a mass of 240 g. What is its density?

  1. A

    0.13 g/cm³

  2. B

    8.0 g/cm³

  3. C

    24 g/cm³

  4. D

    7200 g/cm³

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Answer overviewCorrect answer: B — 8.0 g/cm³
01

Answer and reasoning

1 mark
How to approach it

Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.

  1. 1

    The correct choice is B: 8.0 g/cm³

  2. 2

    A inverts the formula. C divides by only one dimension. D multiplies mass by volume instead of dividing, which is the slip a candidate working too fast makes.

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