Page 63 - Q & A STPM 2022 Physics

ANSWERS

STPM Model Paper 960/1
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Section A
1. D: Average time = 24.475 s
t = (24.5 ± 0.1) s
20
2. B: u = 0 + at . v = 0 + at 2
1
v – u
a =
t – t 1
2
Semester
T
1
1 3. A: H = (u + 0)( ) = uT
2 2 4
4. C: (v cos 60°)(1.0) = 6.0 m, gives v = 12.0 m s –1
1
y = (12.0 sin 60°)(1.0) – g(1.0) 2
1 2
= 5.5 m
5. C: F = 12.0 N = (1.0 + 2.0 + 3.0)a
T = (1.0)(2.0) N = 2.0 N
2
T – T = (2.0)(2.0) N, gives T = 6.0 N
1
2
1
6. A: At 7.5 m s , F = (1.5 )(600 N)
2
–1
Power, P = Fv = 10.1 kW
7. B: Geo-synchronous orbit is above the equator and at the same direction as the
rotation of the Earth about its axis.
1 GMm GMm
2
8. C: mu = (– ) – (– )
2 3R R
u = 4GM
3R
9. D: Moments about the centre of the square = 0
Resultant force = 0
10. A
EA
11. A: F = kx = ( l )x
k = 2k
P Q
E A E A
P = 2( Q )
2l l
E
P = 4.0
E
Q
1 1 3
12. B: M c = M c = RT
2
2
2 H H 2 He He 2
c M
H = He = 1.4
c
He M
H
536
ANS STPM Q&A Physics.indd 536 16/02/2022 4:35 PM