2013_IJC_H2_Physics_P1 solutions

[Turn over INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION 2 in preparation for General Certificate of Education Advanced Level Higher 2 PHYSICS Paper 1 Multiple Choice Additional Materials: Multiple choice answer sheet 9646/01 16 Sep 2013 1 hour 1 A 11 A 21 A 31 C 2 A 12 D 22 D 32 B 3 B 13 C 23 B 33 A 4 D 14 C 24 C 34 B 5 C 15 B 25 D 35 C 6 C 16 D 26 D 36 D 7 A 17 C 27 D 37 C 8 B 18 C 28 C 38 A 9 C 19 B 29 C 39 A 10 B 20 D 30 D 40 D 1 ANSWER – A

2 ANSWER – A   -1 -10 2 0 5 10 0 5 m s (1 s.f) 10 0 0 5 m s100 10 v x t v x t xtvv xt .. . v . .               3 ANSWER – B Using s = ut + ½ a t2, where s = L, u = 0, t = T, a = g, and taking downwards as positive. (1): L = ½ g T2, Let the distance fallen be S at the time t = 0.50 T. (2): S = ½ g (0.5T)2, (2)/(1): S/L = ¼ S = ¼ L or 0.25 L 4 ANSWER – D At the highest point, the speed is at its minimum and is non-zero. The value of the speed at any point in the projectile motion will also be continuous. 5 ANSWER – C

[Turn over 6 ANSWER – C 7 ANSWER – A 8 ANSWER – B All the forces must pass through a common point, and they formed a close cyclic polygon. 9 ANSWER – C Loss in G.P.E. by Y = gain in G.P.E. by X + gain in K.E. by X and Y   213.0 9.81 3.0sin40 2.0 9.81 3.0sin30 2.0 3.0 2 v       3.3v  m s−1 10 ANSWER – B 30 ° 5.0 N

11 ANSWER – A Linear velocity is a vector, and it is varying due to its varying direction although its speed is constant. Angular velocity is constant as it is moving in a constant direction and magnitude. Kinetic energy is constant as it is a scalar quantity. 12 ANSWER – D Both points P and Q will have negative potential, and hence the mass at P and Q will be negative potential energy. As Q is further away, numerically Q is less negative and hence greater than P. 13 ANSWER – C. 14 ANSWER – C 15 ANSWER – B A The maximum potential energy of oscillator Q is greater than oscillator R. B The maximum linear momentum of oscillator P is the largest. Since they have the same mass, is the largest. C The angular frequency of oscillator Q is the largest.

[Turn over > Since they have the same mass and the same amplitude, > D The angular frequency of oscillator R is smaller than oscillator Q. = Since they have the same mass and > 16 ANSWER – D Point X is at the equilibrium position. Point Y is at the maximum positive displacement. The phase angle between X and Y will be 180 + 90 = 270o. 17 ANSWER – C Period of E is ~ 1.3 ms, and frequency is 0.75 Hz. Period of G is 1.0 ms, and frequency is 1.0 Hz. Waves E and G have the same amplitude, yo, and hence they will have the same intensity. Wavelength of wave E will be longer than wave G, as freque