Physics Past Questions and Answers

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules?

A Translational motion
B Rotational motion
C Brownian motion
D Oscillatory motion

Question 3212:

Each of the following physical quantities is classified as a vector or a scalar quantity. Which of the classifications is correct?

A Electric potential (Vector)
B Momentum (scalar)
C Gravitational field intensity (scalar)
D Magnetic flux density (vector)

Question 3213:

Which of the following statements about a spring balance and/or a chemical balance is not correct?

A The chemical balance operates on the principle of moments
B The sprin balance operates on Hooke's law
C Either may be used to measure the weight of a substance
D The reading of a spring balance changes over the surface of the earth, while that of the chemical balance remaind constant

Question 3214:

The friction which exists between two layers of liquid in relative motion is called

A Capillarity
B Surface tension
C Viscosity
D Cohension

Question 3215:

A body of mass 25kg, moving at 3ms^-1 on a rough horizontal floor is at rest after sliding through a distance of 2.50m on the floor. Calculate the co-efficient of sliding friction. [g = 10.0ms^-2]

A 0.09
B 0.18
C 0.36
D 0.54