Waec Physics Past Questions For Year 2017
Question 6
Which of the following processes is not a surface phenomenon?
- A. Condensation
- B. Evaporation
- C. Photo Emission
- D. Thermionic Emission
Question 7
A body weighing 14N in air is partially immersed in water. If the mass of water displaced in the process is 200g, calculate the upthrust on the body. [g=10\(m/s^{2}\)]
- A. 2.0N
- B. 3.0N
- C. 3.5N
- D. 7.0N
Question 8
Two forces 100N and 60N act on an object of mass 10kg as illustrated in the diagram above. Neglecting friction, calculate the acceleration of the object.
- A. 4.0\(ms^{-2}\)
- B. 13.4\(ms^{-2}\)
- C. 16.0\(ms^{-2}\)
- D. 22.6\(ms^{-2}\)
Question 9
A ball is projected horizontally from the top of a tower. Neglecting air resistance, which of the following statements about its motion is/are correct?
I. Vertical acceleration on the ball decreases as it falls
II. The vertical force on the ball remains constant
III. The vertical speed of the ball increases as it falls
- A. Vertical acceleration on the ball decreases as it falls
- B. I only
- C. II only
- D. I and II only
- E. II and III only
Question 10
Which of the following graphs correctly represents the relationship between the kinetic energy (K.E) and the displacement (d) from point of release of a swinging pendulum bob?
- A. I
- B. II
- C. III
- D. IV
