Trial Perak 2012

1. Diagram 4 shows two block P and Q of masses 2m kg and 3m kg respectively tied with a string. The spring which attached to block P is compressed to 12 cm.

(a) Given that the original length of the spring is 20 cm and the force constant, k for the spring is 5000 N m-1 Find the elastic potential energy stored in the spring. [2 markah]

(b) The string is cut and P and Q are pushed apart from each other. (i) Name the physics principle in this motion.[1 markah]

ii) If Q moves at a speed of 6 ms-1, determine the speed of p. [2 markah]

(c) Determine the value of m. [2 markah]

TRIAL MELAKA SET 1 2010

7. Diagram 7.1 and 7.2 show two actions on landing activity by two athletes.

Diagram 7.2Rajah 7.2Diagram 7.1Rajah 7.1

a) Both athletes jumped from the same height and fall on the same ground. Kedua-dua atlit itu terjun dari ketinggian yang sama dan mendarat di kawasan yang sama. (i) Name the force that causes the athlete to fall down Namakan daya yang menyebabkan atlet-atlet itu jatuh?

[ 1 mark ] [ 1 markah ] (ii) State the name of the phenomenon given to (a)(i) Apakah nama fenomena yang diberikan pada situasi (a)(i)

[1 mark] [1 markah]b)(i) Compare the impact on the athletes during the landing. Bandingkan kesan hentaman ke atas atlit semasa pendaratan tersebut. [ 1 mark] [ 1 markah ] (ii) Explain your answer in (b)(i) Terangkan jawapan anda dalam (b)(i)

[ 2 marks] [ 2 markah ]