Post Utme University of Port Harcourt Physics Past Questions and Answers

Question 1:

Which of the following statement about liquid pressure is NOT correct?

A. At a point in a liquid is proportional to the depth
B. At any point in a liquid is the same at the same level
C. Is exerted equally in all directions at any point
D. Of a liquid at any point of its container acts in a direction perpendicular to the wall
E. At a particular depth depends on the shape of the vessel

Question 2:

A ship traveling towards a cliff receives the echo of its whistle after \(3.5\) seconds. A short while later, it receives the echo after \(2.5\) seconds. If the speed of sound in air under prevailing conditions is \(250 \mathrm{~m} / \mathrm{s}\), how much closer is the ship to the cliff?

A. \(10 \mathrm{~m}\)
B. \(125 \mathrm{~m}\)
C. \(175 \mathrm{~m}\)
D. \(350 \mathrm{~m}\)
E. \(1000 \mathrm{~m}\)

Question 3:

A force of \(16 \mathrm{~N}\) is applied to a \(4.0 \mathrm{~kg}\) block that is at rest on a smooth horizontal surface. What is the velocity of the block at \(t=\) 5 seconds?

A. \(4 \mathrm{~m} / \mathrm{s}\)
B. \(10 \mathrm{~m} / \mathrm{s}\)
C. \(20 \mathrm{~m} / \mathrm{s}\)
D. \(50 \mathrm{~m} / \mathrm{s}\)
E. \(80 \mathrm{~m} / \mathrm{s}\)

Question 4:

The distance travelled by a particle starting from rest is plotted against the square of the time elapsed from the commencement of motion. The resulting graph is linear. The slope of this graph is a measure of

A. Initial displacement
B. Initial acceleration
C. Acceleration
D. Half the acceleration
E. Half the initial velocity

Question 5:

A small needle is carefully floated on water in a beaker. When a few drops of kerosene are introduced into the water, the needle sinks. Which of the following statements correctly explains the observation?

I. There is tension on the water surface II. Kerosene reduces the density of water so that the needle becomes denser than water

III. Kerosene reduces the surface tension of water

A. I only
B. II only
C. III only
D. I and. II
E. I and III