Physics 2012 Waec Past Questions and Answers

Question 6 :

• WAEC 2012

A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then

A. W > U + V
B. W = U + V
C. W = U - V
D. W < U + V

Question 7 :

• WAEC 2012

The movement of fluid up or down a narrow tube is

A. Osmosis
B. Brownian motion
C. Capillarity
D. Diffusion

Question 8 :

• WAEC 2012

Which of the following substances is the most volatile at room temperature?

A. Water
B. Diesel
C. Petrol
D. Kerosine

Question 9 :

• WAEC 2012

A bird flies at 10ms\(^{-1}\) for 3s, 15ms\(^{-1}\) for 3s and 20 ms\(^{-1}\) for 4s. Calculate the bird's average speed

A. 4.5 ms^-1
B. 15.0 ms^-1
C. 15.5 ms^-1
D. 51.7 ms^-1

Question 10 :

• WAEC 2012

The time of flight for a projectile motion is given by the expression

A. \(\frac{U sin \theta}{g}\)
B. \(\frac{U sin \theta}{2g}\)
C. \(\frac{2U sin \theta}{g}\)
D. \(\frac{U sin 2\theta}{g}\)