1.5 A toy car travels from rest at a constant acceleration for 2 seconds until it reaches a

speed of 0.8 m/s. It then continues with this same speed for another 3 seconds as
shown in the graph.

What is the distance travelled by the car in 5 seconds?
A 1.6 m
B 3.2 m
C 4.0 m
D 6.2 m

1.6 An object has a weight of 2620 N. What is the mass of this object?
A 26.2 kg
B 262 kg
C 2620 kg
D 26 200 kg

1.7 A pitch of a note is its position on the musical scale. On which property of sound does
the pitch depend?
A amplitude
B echo
C frequency
D wavelength

1.8 Which is the unit of charges?
A amperes
B coulombs
C joules
D watts

1.9. The diagram shows an object placed in front of a converging lens.

What are the characteristics of the image?
A inverted and real
B inverted and virtual
C real and upright
D virtual and upright

1.10 Resistance is influenced by both the length and thickness of the conductors.
Which of the following copper wires will have the highest resistance in an electric
circuit at constant temperature?


1.11 The diagram shows an uncharged ball covered with metallic paint. The ball is
suspended on an insulating thread. It is placed near a negatively charged rod.

Which diagram shows the charge distribution on the ball?


1.12. There is a current of 5.0 A in a resistor. The potential difference (p.d.) across the
resistor is 12 V. The resistor is switched on.
How much energy is transferred in the resistor in 1.0 minute?
A 25 J
B 60 J
C 1 200 J
D 3 600 J

1.13 The diagram shows part of a circuit consisting of three identical resistors.

What is the total resistance in the circuit?
A 4 Ω
B 6 Ω
C 8 Ω
D 12 Ω

1 answer

Let's address each question one by one:

1.5 Distance travelled by the car in 5 seconds

  • During the first 2 seconds, the car accelerates from rest to 0.8 m/s with a constant acceleration. The distance \( d_1 \) during this time can be calculated using the formula: \[ d_1 = \frac{1}{2} a t^2 \] Since final velocity \( v = a \cdot t \), where \( v = 0.8 , \text{m/s} \) and \( t = 2 , \text{s} \): \[ a = \frac{0.8 , \text{m/s}}{2 , \text{s}} = 0.4 , \text{m/s}^2 \] Now calculate \( d_1 \): \[ d_1 = \frac{1}{2} (0.4) (2^2) = \frac{1}{2} (0.4) (4) = 0.8 , \text{m} \]

  • In the next 3 seconds, the car travels at a constant speed of 0.8 m/s: \[ d_2 = v \cdot t = 0.8 , \text{m/s} \cdot 3 , \text{s} = 2.4 , \text{m} \]

  • Total distance: \[ \text{Total distance} = d_1 + d_2 = 0.8 , \text{m} + 2.4 , \text{m} = 3.2 , \text{m} \]

Answer: B 3.2 m


1.6 Mass of an object with weight 2620 N

  • Weight (W) is related to mass (m) by the equation: \[ W = m \cdot g \] where \( g \) is the acceleration due to gravity (approximately \( 9.81 , \text{m/s}^2 \)). Rearranging: \[ m = \frac{W}{g} = \frac{2620}{9.81} \approx 267.3 , \text{kg} \]

Closest Value: B 262 kg (since the original question may require rounding or approximation).


1.7 Property of sound that pitch depends on

  • Pitch is determined by the frequency of sound waves.

Answer: C frequency


1.8 Unit of charges

  • The SI unit of electric charge is the coulomb.

Answer: B coulombs


1.9 Characteristics of the image in front of a converging lens

  • A converging lens produces a real, inverted image if the object is placed outside the focal length.

Answer: A inverted and real


1.10 Copper wire resistance

  • The longer and thinner the wire, the higher the resistance. Thus, the wire that is longest and most slender would have the highest resistance.

Note: Need more information about the specific wires to provide a precise answer.


1.11 Charge distribution on an uncharged ball near a negatively charged rod

  • The negatively charged rod will repel electrons in the ball, causing a positive charge to accumulate on the side of the ball closest to the rod and a negative charge on the side furthest from the rod.

Note: Need to see diagrams to provide a precise answer.


1.12 Energy transferred in a resistor

  • The energy (E) transferred can be calculated using the formula: \[ E = V \cdot I \cdot t \] where:

    • \( V = 12 , \text{V} \)
    • \( I = 5.0 , \text{A} \)
    • \( t = 1 , \text{minute} = 60 , \text{s} \)

    Now calculate: \[ E = 12 \cdot 5.0 \cdot 60 = 3600 , \text{J} \]

Answer: D 3 600 J


1.13 Total resistance in a circuit of three identical resistors

  • If the resistors are connected in series, total resistance \( R_{total} = R + R + R = 3R \).
  • If they are connected in parallel, \[ \frac{1}{R_{total}} = \frac{1}{R} + \frac{1}{R} + \frac{1}{R} \Rightarrow R_{total} = \frac{R}{3} \]

Note: Need to see the diagram to provide a precise answer regarding their arrangement.


If you have any specific diagrams for questions 1.10, 1.11, or 1.13, feel free to share them!