Post Utme Physics Past Questions and Answers

Question 46:

A rectangular concrete block \(40 \mathrm{~cm} \times 30 \mathrm{~cm} \times 60 \mathrm{~cm}\) of mass \(10 \mathrm{~kg}\) rests on a horizontal flat surface. What is the minimum pressure it can possibly exert on the surface?

A. \(816.6 \mathrm{Nm}^{-2}\)
B. \(816.6 \mathrm{Nm}^{2}\)
C. \(408.3 \mathrm{Nm}^{-2} \)

Question 47:

A simple hydrometer consists of uniform cylinder suitably weighted to float upright in most common liquids. It is graduated to read the relative density of a liquid directly. Which of the following is NOT correct?

A. When placed in a liquid, it displaces exactly its own weight of the liquid
B. Its graduation increases from top to base
C. When placed in a liquid, it displaces exactly its own volume of the liquid
D. The product of the volume and density of liquid displaced is equal to its mass

Question 48:

A stone which is dropped into a dry well hits the bottom in \(2.2\)s. How deep is the well? (Take \(g=10 \mathrm{~m} / \mathrm{s}\) )

A. \(40.4 \mathrm{~m}\)
B. \(2.4 \mathrm{~m}\)
C. \(48.4 \mathrm{~m}\)
D. \(24.2 \mathrm{~m}\)

Question 49:

Which of the units of the following physical quantities are derived?
I. Area
II. Thrust
III. Pressure
IV. Mass

A. I, II, III and IV
B. I, II and III only
C. I, II and IV only
D. I and II only

Question 50:

Which one of the following situations is not possible?

A. A body has zero velocity and non-zero acceleration
B. A body travels with a northward velocity and a northward acceleration
C. A body travels with a constant velocity and a time-varying acceleration
D. A body travels with a constant acceleration and a time-varying velocity