1 Worksheet (AS)
Data needed to answer questions can be found in the Data, formulae and relationships sheet.
1
Five speeds are listed.
[1]
6 m s−1
6 cm s−1
6 km s−1
6 m h−1
Starting with the smallest, what is the order of increasing magnitude of these speeds?
A
B
C
D
2
6 m s−1 → 6 cm s−1 → 6 km s−1 → 6 m h−1
6 cm s−1→ 6 m s−1 → 6 km s−1 → 6 m h−1
6 m h−1 → 6 cm s−1 → 6 km s−1 → 6 m s−1
6 m h−1 → 6 cm s−1 → 6 m s−1→ 6 km s−1
Which of the following correctly lists one scalar and one vector quantity?
A
B
C
D
3
Scalar quantity
displacement
speed
speed
velocity
[1]
Vector quantity
velocity
displacement
distance
displacement
The diagram shows a strip of paper tape pulled at constant speed under a ticker-timer.
The ticker-timer makes 50 dots per second.
[1]
40 cm
What was the speed of the object?
A 4 cm s−1
B 10 cm s−1
C 200 cm s−1
D 400 cm s−1
4
A racing car is fitted with a computer that records the distance travelled every second.
Which set of readings shows that the car is decreasing in speed?
Time / s
0
1
2
A
Distance / m
0
25
50
AS and A Level Physics
Time / s
0
1
2
B
Distance / m
0
50
100
Time / s
0
1
2
C
Distance / m
0
40
60
Time / s
0
1
2
[1]
D
Distance / m
0
25
60
Original material © Cambridge University Press 2010
1
1 Worksheet (AS)
5
Three velocity vectors, u, v and X are shown in the diagram.
[1]
Which statement about the vectors is correct?
A
B
C
D
6
v added to u produces a resultant X
u added to X produces a resultant v
the magnitude of v equals the sum of the magnitude of u and the magnitude of X
the magnitude of u equals the sum of the magnitude of X and the magnitude of v.
Explain what is meant by:
a a scalar quantity
b a vector quantity.
[1]
[1]
7
Name any three scalar quantities.
[3]
8
a Define the velocity of an object.
b Use your answer to a to explain why velocity is a vector quantity.
[1]
[2]
9
Cannons are being fired in a mock battle scene. The spectators are at a safe distance of 600 m
from the cannons. Calculate how long it would take for the sound from the cannons to reach
the spectators. (Speed of sound in air = 340 m s−1.)
[2]
10 A small insect travels a distance of 24 cm in a time of 4.0 minutes. Calculate the average
speed of the insect in m s−1.
[2]
11 The displacement–time graph for an object is shown below.
a What does the gradient of a displacement–time graph represent?
b Describe the journey of the object.
c Calculate the velocity of the object at 2.0 s.
[1]
[2]
[2]
12 A cyclist travels a distance of 3.2 km in 15 minutes. She rests for 30 minutes. She then
covers a further distance of 6.2 km in a time of 40 minutes.
Calculate the average speed of the cyclist in m s−1:
a for the first 15 minutes of the journey
b for the total journey.
AS and A Level Physics
[2]
[2]
Original material © Cambridge University Press 2010
2
1 Worksheet (AS)
13 The diagram shows the displacement–time graph for
an object.
Calculate the velocity of the object at times:
a 4.0 s
b 8.0 s.
[2]
[2]
14 The diagram below shows a stone moving in a horizontal circle of radius 70 cm.
The stone takes a time of 0.62 s for each revolution.
a
Calculate the speed of the stone. (Hint: In a time of 0.62 s, the stone travels a distance
equal to the circumference of the circle.)
b The stone starts at point A. What is the magnitude of the displacement of the stone
from A after a time of:
i 0.31 s
ii 0.62 s?
[2]
[1]
[1]
15 The table below shows the time taken (t) and the displacement (s) of a trolley rolling down a ramp.
Time / s
0
0.1
0.2
0.3
0.4
0.5
0.6
Displacement / 10−2 m
0
0.8
3.0
6.8
12.0
18.9
27.0
a Plot a graph of displacement against time. (Make sure that you sketch a smooth curve.)
b Describe the motion of the trolley. Explain your answer.
c By drawing tangents to the curve at times 0.2 s and 0.5 s, determine the velocities of the
trolley at these times.
d The acceleration a of the trolley is given by:
a=
[2]
[2]
[2]
change in velocity
time taken
Use the equation above and your answers to c to determine the acceleration a of the trolley. [2]
Total:
AS and A Level Physics
42
Score:
Original material © Cambridge University Press 2010
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