Physics Past Questions and Answers

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 3762:

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 3763:

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 3764:

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.

Question 3765:

The horizontal component of the initial speed of a particle projected at 30° to the horizontal is 50 ms\(^{-1}\). If the acceleration cf free fall due to gravity is 10ms\(^{-2}\), determine its: (a) initial speed; (b) speed at maximum height reached.