KULLEĠĠ SAN BENEDITTU · 2018-12-26 · Kulleġġ San Benedittu Secondary School Kirkop. Physics...
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Kulleġġ San Benedittu Secondary School Kirkop. Physics Year 10 Track 3 Page 1 of 12 Mark KULLEĠĠ SAN BENEDITTU Secondary School, Kirkop HALF YEARLY EXAMINATION – 2017/18 Track 3 YEAR 10 Physics TIME: 1hr 30min Name: ____________________________ Class: ___________ Answer ALL questions in Section A and Section B. All working must be shown. The use of a calculator is allowed. Where necessary take the acceleration due to gravity as g =10m/s 2 . Forces And Motion W = mg F = ma v = u + at s = ut + ½ at 2 s= (u+v) 2 t v 2 = u 2 +2as Average velocity = total distance total time Area of trapezium = 1 2 (a + b) h Waves v=f f= 1 η= speed of light in air speed of light in medium η= real depth apparent depth m= height of image height of object m= distance of image distance of object FOR EXAMINER’S USE: Number 1 2 3 4 5 6 7 8 Total Max. Mark 8 8 8 8 8 15 15 15 85 Actual Mark Total Theory Total Practical Final Mark Maximum Mark 85 15 100 Actual Mark
Transcript of KULLEĠĠ SAN BENEDITTU · 2018-12-26 · Kulleġġ San Benedittu Secondary School Kirkop. Physics...
Kulleġġ San Benedittu Secondary School Kirkop. Physics Year 10 Track 3 Page 1 of 12
Mark
KULLEĠĠ SAN BENEDITTU
Secondary School, Kirkop
HALF YEARLY EXAMINATION – 2017/18
Track 3
YEAR 10 Physics TIME: 1hr 30min
Name: ____________________________ Class: ___________
Answer ALL questions in Section A and Section B.
All working must be shown. The use of a calculator is allowed.
Where necessary take the acceleration due to gravity as g =10m/s2.
Forces And
Motion
W = mg
F = ma
v = u + at
s = ut + ½ at2
s = (u+v)
2 t
v2 = u2+2as
Average velocity = total distance
total time
Area of trapezium =1
2(a + b) h
Waves
v = f f =
1
𝑇
η =speed of light in air
speed of light in medium η =
real depth
apparent depth
m =height of image
height of object m =
distance of image
distance of object
FOR EXAMINER’S USE:
Number 1 2 3 4 5 6 7 8 Total
Max. Mark 8 8 8 8 8 15 15 15 85
Actual Mark
Total Theory Total Practical Final Mark
Maximum Mark 85 15 100
Actual Mark
Kulleġġ San Benedittu Secondary School Kirkop. Physics Year 10 Track 3 Page 2 of 12
SECTION A [This section carries 40 marks]
1. This question is about WAVES.
Look carefully at the displacement-time graph and fill in the blanks below.
a. The wave is a transverse wave with an amplitude of __________cm. The diagram
shows _______ crests. [2]
b. What is the periodic time of this wave?
__________________________________________________________________ [1]
c. Calculate the frequency of this wave.
____________________________________________________________________
__________________________________________________________________ [2]
d. The wavelength of the waves is 8m. Calculate the velocity of the waves.
____________________________________________________________________
__________________________________________________________________ [2]
e. On the same diagram, draw another wave having the same wavelength but a
smaller amplitude. [1]
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2. This question is about the electromagnetic
spectrum
Nicole and James were listening to a radio. Radio
waves are part of the electromagnetic spectrum.
a. All the waves of the electromagnetic spectrum are __________________ waves. [1]
b. Which of the electromagnetic waves:
i. Has the longest wavelength ___________________ [1]
ii. Is used to detect bone fractures ___________________ [1]
iii. Can be most harmful to humans ___________________ [1]
c. Suggest two properties common to all the waves that make up the electromagnetic
spectrum.
____________________________________________________________________
__________________________________________________________________[2]
d. A radio station transmits waves at a frequency of 95,000,000Hz.
Calculate the wavelength of these radio waves in metres given that their velocity is
3x108 m/s.
____________________________________________________________________
__________________________________________________________________[2]
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3. This question is about LIGHT and REFLECTION
Bobby is a sausage dog. The diagram below shows how Bobby sees the image of a
bone in a mirror.
a. On the diagram above draw:
i. the incident ray [1]
ii. the position of the actual bone (object). Mark it with an O. [1]
b. On the diagram mark the angle of reflection r. [2]
c. Underline the correct words.
i. The image of the bone appears (bigger than , the same size as , smaller than) the
actual bone. [1]
ii. The image in the mirror is (real , diminished , virtual). [1]
d. State the law of reflection.
____________________________________________________________________
__________________________________________________________________[2]
Kulleġġ San Benedittu Secondary School Kirkop. Physics Year 10 Track 3 Page 5 of 12
4. This question is about LIGHT and REFRACTION
Joanne went fishing at Wied iż-Żurrieq. While looking at the sea,
she saw a fish. The diagram below shows how rays of light travel
in this situation.
a. Use your diagram to include:
i. two virtual rays. [1]
ii. the position of the image. Mark this position as ‘I’. [1]
b. Underline the correct words: As light travels from water to air
(reflection, refraction, diffraction) takes place. This makes the fish appear at (a greater,
the same, a lower) depth. [2]
c. Use the words ‘increases’, ‘decreases’ or ‘remains the same’ to describe what
happens to light rays as these travel from water to air.
Speed of light ___________________________
Frequency ___________________________ [2]
d. The fish is at a depth of 50 cm. Given that the refractive index of water is 1.33,
calculate the depth at which the fish appears to be. Give your answer in metres.
____________________________________________________________________
__________________________________________________________________[2]
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5. This question is about LENSES.
The diagram shows a lens in a projector.
a. Draw two rays on the diagram to show how the image is produced. [3]
b. Is this image:
i. Magnified or diminished? ________________________ [1]
ii. Upright or inverted? ________________________ [1]
c. Calculate the magnification of the lens. ____________________________________________________________________
____________________________________________________________________
__________________________________________________________________[2]
d. Describe one change which occur to the image when the object is between the lens
and the focal point.
__________________________________________________________________[1]
Object
F F
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SECTION B [This section carries 45 marks]
____________________________________________________________________ 6. This question is about MOTION.
Robert uses his scooter to travel from home to work.
a. The table shows how the velocity of the scooter changes with time.
Velocity (m/s) 0 3 6 9 12 15 18 21 21
Time (s) 0 2 4 6 8 10 12 14 16
i. On the graph paper provided, draw a graph of velocity on the y-axis against time
on the x-axis to represent Robert’s journey with his scooter. [4]
ii. Find the acceleration of Robert’s scooter in the first 14 seconds.
____________________________________________________________________
__________________________________________________________________[2]
iii. From your graph, or otherwise, find the distance Robert travelled in the first 16
seconds.
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
__________________________________________________________________[2]
b. After 16 seconds, Robert sees the red traffic lights which are 55m away. This table
gives information about the thinking and braking distances of the scooter at different
velocities.
Velocity m/s Thinking distance /m Braking distance /m
13.5 9 14
21 14 35
31.5 21 75
i. Use the table to calculate Robert’s reaction time.
____________________________________________________________________
__________________________________________________________________[1]
Kulleġġ San Benedittu Secondary School Kirkop. Physics Year 10 Track 3 Page 8 of 12
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ii. What is the total stopping distance of the scooter?
____________________________________________________________________
__________________________________________________________________[1]
iii. Did Robert manage to stop before the traffic lights? Explain.
____________________________________________________________________
__________________________________________________________________[2]
iv. Robert is very tired. How will this affect the stopping distance? Explain.
____________________________________________________________________
__________________________________________________________________[2]
v. Name one factor other than velocity that will affect the braking distance.
____________________________________________________________________
__________________________________________________________________[1]
7. This question is about SOUND WAVES.
a. A technique called ultrasonic cleaning is often used to get rid
of the dust, dirt, oils, and other particles attached to small objects.
Inside the cleaner, water molecules are made to vibrate rapidly
and the objects are cleaned.
i. What is an ultrasound?
__________________________________________________________________[1]
ii. Are these waves audible by humans? Explain.
____________________________________________________________________
__________________________________________________________________[2]
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iii. Are ultrasounds transverse or longitudinal waves?
_________________________________________________________________ [1]
iv. If the frequency of the ultrasound is 30kHz and the speed of sound in water is
1500m/s, calculate the wavelength of the wave.
____________________________________________________________________
____________________________________________________________________
__________________________________________________________________[3]
b. Keith and Sue set up the following apparatus to measure the speed of sound in air.
i. Describe the steps carried out by Keith and Sue to measure the speed of sound
in air.
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
____________________________________________________________________
__________________________________________________________________[4]
ii. The speed of sound in air is 340m/s and the data logger recorded a time of 0.01s for
the sound to travel between the microphones. Calculate the distance between the
microphones.
____________________________________________________________________
____________________________________________________________________
__________________________________________________________________[2]
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iii. Keith suggests that the speed of sound in air can also be found if one student uses
a starting pistol and another student switches on a stopwatch 200m away. Will this
experiment give a more accurate measure of the speed of sound in air? Explain.
____________________________________________________________________
__________________________________________________________________[2]
8. This question is about the PROPERTIES OF WAVES.
The diagram represents wave crests produced at a frequency of 20Hz in a ripple tank.
The wave crests are in deep water travelling towards a straight boundary where the
water becomes shallow.
a. Which piece of apparatus would you use to produce straight water waves?
__________________________________________________________________[1]
b. Water are transverse waves. What are transverse waves?
____________________________________________________________________
__________________________________________________________________[2]
c. i. Complete the diagram above to show what happens to water waves in the
shallow section. [2]
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ii. Explain what change, if any, there is in the velocity and frequency of the waves as
these pass in the shallow section.
Wave velocity __________________________________ [1]
Frequency __________________________________ [1]
iii. Use the diagram to measure the wavelength of the waves as these travel in deep
water.
Wavelength _____________________ cm [1]
iv. Calculate the speed of the water waves as these travel in deep water. Give your
answer in m/s.
____________________________________________________________________
__________________________________________________________________[2]
d. During diffraction, wave crests pass through a gap.
i. Complete the diagrams above to show what happens to the wave crests as these
pass through the two gaps. [4]
ii. Diffraction depends on the _____________________ of the waves. [1]
END OF PAPER
