Page 17 - 1202 Question Bank Physics Form 4

4. (a) m = r V, l = ! V (d) Graph of T against l
2
3
(b) • No measuring instrument can measure density and volume T / s 2
2
accurately.
• No suitable object for standard density and standard volume.
• Units for derived quantity become very complex. 2.8
• Hinder effective communication among physicists.
2.4
5. (a) Draw graph of V against x. Extrapolate it to find V when
0
x = 0. V is 46 L.
0
(b) Using interpolation method V is 41 L when x = 50 km, hence 2.0
the petrol consumption is
V – V = 46 – 41 1.6
0
= 5 L
40.0 ©PAN ASIA PUBLICATIONS
(c) 1.2
Distance, 40 60 80 100 120 140 160 180 200
x / km 0.8
Volume 0.4
of petrol, 42.60 40.05 37.93 35.80 33.25 31.55 30.28 27.30 25.60
V / L
0
10 20 30 40 50 60 70 80 I / cm
(d) Graph of remaining volume of petrol, V against distance, x 2.38 – 0
(e) Gradient, s =
60 – 0
= 0.0397 s cm –1
2
Remaining volume of petrol, V / L 4π 2
g =
s
Chapter 1 – Chapter 2
= 994 cm s –2
50
40
CHAPTER 2
30
20
Paper 1
10
1. D Distance is the total length travelled by the security personnel
x / km
0 = 5 + 7 + 5 + 10 + 10 + 10 + 10
20 40 60 80 100 120 140 160 180 200
= 57 m.
Displacement is the distance travelled in a specified direction PQ
= 7 + 10 +10
Paper 3 = 27 m.
1. (a) Measure l and l and then taking average. 2. A Not sufficient information to check whether the object moves
1 2
with constant velocity or not (the dots do not display consistent
Clamp equal spacing pattern).
3. A u = 0.2 cm
0.02 s
= 10 cm s –1
l + l
l l l l = 1 2 v = 1.4 cm
1 2
2 0.04 s
= 35 cm s –1
∆ t = 4.5 × 0.02
= 0.09 s (From 1 the mid-point to the end mid-point)
st
Acceleration = 35 – 10
0.09 s
Centre of bob = 278 cm s –2
(b)
4. D 10 ticks = 0.2 s
l / cm t / s T / s T / s 2 4 cm
2
u = 0.2 s
20.0 17.65 0.833 0.780 = 20 cm s –1
30.0 22.15 1.108 1.228 v = 24 cm
0.2 s
25.00 1.250 1.563 = 120 cm s
–1
50.0 27.95 1.398 1.954 ∆ t = (6 – 1) × 0.2 s
= 1 s
60.0 30.80 1.540 2.372 (120 – 20) cm s –1
Acceleration = 1 s
(c) (i) The manipulated variable: length of pendulum, l = 100 cm s –2
(ii) The responding variable: the period T of the pendulum

108

Answer QBank Physics F4.indd 108 10/02/2022 4:03 PM