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. $5\mathrm{cm}$