cameroon gce O level June 2024 physics 2

cameroon gce O level June 2024 physics 2

cameroon gce O level June 2024 physics 2

SECTION I (I hour)
1. (a) Define pressure and state its unit of measurement (2 marks)
Explain why a sharpened edge knife cuts meat easily, when a constant force is applied. (2 marks)
(b) Calculate the pressure water exerts at a depth of 6 m in a pond given that the density of water is 1000 kg m~3\
(2 marks)
2. (a) Distinguish between contact and non-contact forces.
(b) Explain why an object weighs more when taken from the equator of the earth to the poles
(2 marks)
(2 marks)
3. The table in figure 1 contains part of the electromagnetic spectrum arranged in decreasing order of wavelength.
Visible light X Y Gamma rays
Figure 1
(a) Identify the radiations X and Y and state how each can be detected.
(b) Give two differences between electromagnetic waves and sound waves.
(c) Differentiate between transverse and longitudinal waves.
(4 marks)
(2 marks)
( 2 marks)
4. Figure 2 shows a uniform plank of negligible mass and of length 2 m, on a support, A, at its midpoint. Two weights
of 60 N and 80 N are attached to it.

60 N 80 N
Figure 2
(a) State two conditions necessary for the system to be in equilibrium.
Calculate:
(b) the distance, x, of the 80 N object from the support when the system is in equilibrium.
(c) the force, R, on the plank by the support
(2 marks)
(2 marks)
(2 marks)
5. (a) (i) Define interference.
(ii) Name the two types of interference.
(iii) Explain what happens to the resultant amplitude of each type named in (ii) above,
(b) Figure 3 shows how a stationary wave is formed on a string tied at both ends A and B.
( 1 mark)
(2 marks)
(2 marks)
Figure 3
(i) Calculate the wavelength of the stationary wave.
(ii)State and explain what happens to the small object placed at X.
(2 marks)
(2 marks)