Physics Past Questions and Answers

Four co-planar forces of magnitudes 10N, 17N, 6N and 20N act at point O as shown in the above diagram. Determine the magnitude of the resultant force

A 53.N
B 21.0N
C 7.0N
D 5.0N

Question 1567:

The outlet of a bicycle pump is used to inflate a football as illustrated in the diagram above. Why does the pressure of the air inside the pump increases as the pump handle is slowly pushed downward at constant temperature?

A Momentum of the air molecules are increased
B Volume occupied by the molecules are increased
C Frequency of collision of the air molecules with the walls of the pump is increased
D More air molecules are collidin with one another in the system

Question 1568:

The diagram above illustrates a waveform. Which of the point on the waveform are in phase?

A P and R
B R and T
C P and T
D Q and S

Question 1569:

An electric circuit is connected as illustrated above. Determine the equivalent e.m.f and current flowing through the circuit respectively, neglecting the internal resistance of the cells

A 2V, 1.0A
B 2V, 4.0A
C 6V, 0.3a
D 6V, 3.0a

Question 1570:

A projectile is released with a speed u at an angle \(\theta\) to the horizontal. With the aid of a diagram, show that the time of flight is equal to \(\frac{2uSin\theta}{g}\), where g is the acceleration of free fall.