Post Utme Abia State University Physics Past Questions and Answers

Question 11:

A metal block of mass \(5 \mathrm{~kg}\) lles on a rough horizontal platform. If a horizontal force of \(8 \mathrm{~N}\) applied to the block through Its centre of mass just slide block on the platform, the coefficlent of limiting friction between the block and the platform is ____________

A. \(0.16\)
B. \(0.63\)
C. \(0.80\)
D. \(1.60\)
E. \(2.00\)

Question 12:

Which of the following is NOT a force?

A. Friction
B. Tension
C. Upthrust
D. Weight
E. Impulse

Question 13:

Two masses \(40 \mathrm{~g}\) and \(60 \mathrm{~g}\) respectively, are attached firmly to the ends of a light metre rule. The centre of gravity of the system is ____________

A. At the mid-point of the metre rule
B. \(40 \mathrm{~cm}\) from the lighter mass
C. \(40 \mathrm{~cm}\) from the heavier mass
D. \(60 \mathrm{~cm}\) from the heavier mass indeterminate because the metre-rule is light

Question 14:

A \(0.05 \mathrm{~kg}\) bullet travelling at \(200 \mathrm{~ms}\) horizontal strike; a thick vertical wall a load of mass \(10 \mathrm{~kg}\) is suspended on the rule at \(L\), the \(10 \mathrm{~cm}\) mark. If the rule is kept in equilibrium by a string \(p\), fixed at p and attached to the rule at \(\mathrm{R}\), the \(20 \mathrm{~cm}\) mark, then the tension \(T\) In the string is ____________

A. \(25 \mathrm{~N}\)
B. \(50 \mathrm{~N}\)
C. \(250 \mathrm{~N}\)
D. \(5000 \mathrm{~N}\).
E. \(25000 \mathrm{~N}\)

Question 15:

A force of ICON stretches an elastic string to a total length of \(20 \mathrm{~cm}\). If an additional force of ICON stretches the string \(5 \mathrm{~cm}\) further, find the natural length of the string.

A. \(15 \mathrm{~cm}\)
B. \(12 \mathrm{~cm}\)
C. \(10 \mathrm{~cm}\)
D. \(8 \mathrm{~cm}\)
E. \(5 \mathrm{~cm}\)