QUESTION 1PAPER 2 (4531/2)

Section Mark Answer Note

(a) 1 0.1 cm // 1 mm Jwpn dgn unit betul(b) 1 3.4 cm // 34 mm Jwpn dgnunit betul(c) 1 Parallax error.(d) 1 Eye ofthe student must be perpendicular to the

scale of the ruler.TOTAL 4

QUESTION 2

Section Mark Answer Note

(a) 1 Force per unit area // force *- Area

(b) 11

50 X 10 + 40/1000125000N m"2//1.25 X 105N in2

(c) 11

wearing shoes //slippersIncrease the area ofcontact/Aising formula P =F/A therefore when A increaseP is small

TOTAL 5

QUESTION 3i z 1

Section Mark AnswerNote

(a) 1 Degreeof hotness / coldness of a substance.(b)(i) 1 Electrical energy changes to heat energy.(b)(ii) 1

1

Heat supplied toovercome intermolecularbonding of water.Not to increase kinetic energy of watermolecules// Kinetic energy ofwater molecules constant.

(c) 1

1

100 (5 x 60) = 0.05 U II 100 (5) = 0.05 /v // 100(5) = 50 lv/v = 6.0 x 105 J kg1.

Accept: Substitutionwithout changing unitsoftime or / and mass.Ans. with correct unit

TOTAL 6

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