IGCSE Physics (0625) 1.3 Mass and weight Paper 3

Question

Fig. 2.1 shows a measuring cylinder containing water.
Fig. 2.2 shows the same measuring cylinder after a stone has been lowered into it.

(a) Calculate the volume of the stone.
volume = ………………………………………….. \(cm^3\)

(b) Another stone has a mass of 98.4 g. The volume of this stone is 41.0 \(cm^3\) .
Calculate the density of the stone.
density = ………………………………………. g / \(cm^3\).

(c) The stone with a mass of 98.4 g has a weight of 0.984 N.
Explain the difference between mass and weight

Answer/Explanation

Answer:

(a) (volume =) difference in candidate’s readings 
24 (\(cm^3\))

(b) (density =) mass ÷ volume
(density =) 98.4 ÷ 41.0
2.4(0) (g/\(cm^3\))

(c) idea that mass is (a measure of) amount of matter in a body
idea that weight is a gravitational force

Question

Fig. 1.1 shows a set of masses made from the same material.

(a) Identify the quantity that is the same for all the masses.
Tick one box.

(b) The largest mass is 2.5 kg.
State the number of grams in 2.5 kg.
2.5 kg = …………………………………………………………………………………………………………. g

(c) The three largest masses are 2.5 kg, 1.0 kg and 0.5 kg.
Calculate the combined weight
of these three masses. Include the unit.
weight =………………………………………………………………………………………………………………….

Answer/Explanation

Answer:
(a) top box ticked: density
(b)
2500 (g)
(c) W = mg in any form
(2.5 + 1.0 + 0.5) = 4
40
N or newtons

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