2018 - WAEC Physics Past Questions and Answers - page 1

The S.I unit for sound energy is

The general definition of elastic modulus is

The diagram above illustrates a simple barometer. Which distance measures the atmospheric pressure?

The property of a body to remain at rest or to continue in uniform motion in a straight line is called

During a training session, two footballers pass a ball repeatedly between each other. The 'to and fro' motion of the ball is not simple harmonic because the

I. Acceleration of the ball is not directed towards a fixed point

II. Restoring force is not directed towards the centre

III. Acceleration of the ball is not directly proportional to the displacement from a fixed point

Which of the statements above are correct?

A dam is able to hold a large quantity of water because its wall is

A body of mass m moving around a circle of radius r with a uniform speed v experiences a centripetal force F. The work done by the centripetal force on it is

A block is acted upon by TWO horizontal forces as illustrated in the diagram above. The block accelerates at 1.5$m{s}^{-2}$. Calculate the mass of the block.

Which of the following quantities are dimensionally independent?

I. Dielectric constant    II. Momentum   III. Efficiency   IV. Refractive index

A body is projected with an initial velocity u at angle $\theta$ to the horizontal. If $R_{max}$ is the maximum range of the projectile, what does the relation $\frac{u^2}{R_{max}}$ represent?