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Q2— Section header —
1.3A ball is released from a h eight above the floor. The ball falls vertically and bounces o the floor a number of times . Ignore the effect of friction and assu
1.4Two bodies undergo an INELASTIC collision in the absence of friction. Which ONE of the following combinations of momentum and kinetic energy of the system is CORRECT MOMENTUM
1.6Which ONE of the following CANNOT be explained using the Doppler effect? Emission of electrons from a metal surface Flow met use d in hospitals ed spectral lines
1.7The magnitude of a electric field a distance from a point charge is The magnitude of an electr ic field
1.9The speed of rotation of the coils in an generator is increased. Which ONE of the following combinations of frequency and output voltage for the generator will occur as a result of the change FREQUENCY
2.1State Newton third l aw in words (2\ Draw a labelled free body diagram showing ALL the forces acting on the
2.3Calculate the magnitude of the
2.3.1inetic frictional force between the 1 kg block and the surface (3\
2.3.2ension in the string connecting the two blocks (6\ [16]16
3.1Name the type of motion described above
3.2Calculate the:
3.2.1agnitude of the velocity of the object at point (4\
3.2.2Heigh of point above the ground After hitting the ground, the object bounces once and then comes to rest on the ground.
3.3Sketch an acceleration time graph for the entire motion of the object. (3\ [13 10
4.2State the principle of conservation of linear momentum in words (2\
4.3Calculate the magnitude of the velocity with which the bullet hits the block. (4\ [11] 1111
5.1ing ENERGY PRINCIPLES only calculate the speed of the block at point (4\
5.2Explain why the kinetic energy at point is the same as that at point (2\
5.3Explain the term non conservative force (2\
5.4Calculate t the slope [15] 5 kg 1215
Q6— Section header —
6.2Explain why the wavelength calculated in QUESTION
6.1.1differs from that obtained in QUESTION
6.1.2(2\
6.3se your knowledge of the Doppler effect to explain red shift (2\ [12] 1312
7.2Calculate the:
7.2.1Magnitude of the charge on each sphere
7.2.2Excess number of electrons on sphere (3\
7.3is a point at a distance of 1 m from sphere
7.3.1What is the direction of the net electric field at point (1\
7.3.2Calculate the number of electrons that should be remov from sphere so that the net electric field point is 3 x 10
8.1Learners want to construct a n electric heater using one of two wires of different resistances . They conduct experiments and draw the graphs as hown below
8.1.1Apart from temperature, write down TWO other factors that the learners should consider to ensur a fair test when choosing which wire to use
8.1.2Assuming all other factors are kept constant, sta te which ONE of the two wires will be the most suitable to use in the heater. Use suitable calculations to show clearly how you arrive at the answer. (8\
8.2In the circuit below the reading on ammeter is 0,2 A. he battery has emf of 9 nd internal resistance
8.2.1Calculate the urrent through the 5,5
8.2.2Calculate the nternal resistance of the battery (7\
8.2.3Will the ammeter reading INCREASE, DECREASE or REMAIN THE SAME if the 5,5 is removed from the circuit? Give a reason for the answer. (2\ 16
Q9— Section header —
9.1A 100 W light bulb is connected to this generator and it glows at its maximum brightness . Use the information from the graph to calculate the:
9.1.1Resistance of the bulb (5\
9.1.2rms current through the bulb (3\
9.2Give ONE reason why voltage is preferred to voltage for everyday use. (1\ [9]9
10.4.1Give a reason why this change does NOT affect the maxim kinetic energy of the ejected photoelectrons (1\
10.4.2How does the increased intensity affect the reading on the ammeter Write down only INCREASES, DECREASES or REMAINS THE SAME. (1\
Q10— Section header —
4.2(2\ [14] TOTAL: Metal surface Ultraviolet light14