Waec Physics 2008 Past Questions and Answers

Question 6:

• WAEC 2008

A car travelling with a uniform velocity of 30ms^-1 along a horizontal road overcomes a constant frictional force of 600N. Calculate the power of the engine of the car

A. 18kW
B. 20kW
C. 180kW
D. 200kW

Question 7:

• WAEC 2008

A rectangular block of dimensions 2.0m x 1.0m x 0.5m weighs 200N. calculate the maximum pressure exerted by the block on a horizontal floor.

A. 100Nm^-2
B. 200Nm^-2
C. 300Nm^-2
D. 400Nm^-2

Question 8:

• WAEC 2008

A very sensitive spring balance was used to determine the weight of an object at the north pole. When the same spring balance was used to measure the weight of the same object at the equator, it was found to reduce. The explanation for this observation is that

A. It is very hot at the equator
B. The spring balance has expanded
C. The acceleration of free fall due to gravity varies with location
D. The mass of the body is reduced

Question 9:

• WAEC 2008

The diagram above illustrates a Hare's apparatus. \(\mathit{e}_1, \mathit{e}_2\) represent densities and \(\mathit{h}_1, \mathit{h}_2\) heights of columns of liquids. Which of the following equations is correct?

A. \(\mathit{h}_1 = \frac{\mathit{h}_2 \mathit{e}_1}{\mathit{e}_2}\)
B. \(\mathit{h}_1 = \frac{\mathit{h}_2 \mathit{e}_2}{\mathit{e}_1}\)
C. \(\mathit{h}_1 = \frac{\mathit{e}_1 \mathit{e}_2}{\mathit{h}_2}\)
D. \(\mathit{h}_1 = \frac{\mathit{e}_1}{\mathit{h}_2 \mathit{e}_2}\)

Question 10:

• WAEC 2008

The diagram above represents the displacement-time graph of the motion of an object thrown upwards. The velocity of the object at the point P is

A. Maximum
B. Uniform
C. Zero
D. Terminal