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Post Utme Physics Past Questions and Answers

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Post Utme Physics Past Questions

Question 1131:


A uniform meter rule AB has a mass 15g. A 30g mass is suspended at the 10.0cm mark, and another 5g mass is suspended at the 65.0cm mark. Calculate the position of the fulcrum that will keep the meter rule balanced horizontally.

A. 50.0cm
B. 32.0cm
C. 27.5cm
D. 17.9cm


Question 1132:


A rectangular block measures 40cm×25cm×5cm and is made of a material of density 7800kg/m3. Calculate the pressure the block exerts on the floor when it stands on the smallest of its surfaces.

A. 3.12×103N/m2
B. 3.00×103N/m2
C. 1.95×104N/m2
D. 3.12×104N/m2


Question 1133:


A ship sinks in the bottom of a 250m deep lake. The atmospheric pressure over the lake is 103×10 s Pa. Taking the density of water in the lake to be 1000kg/m3, calculate the pressure exerted on the boat.
[Acceleration due to gravity =10m/s2]

A. 2.60×106Pa
B. 2.50×106Pa
C. 2.60×105Pa
D. 1.63×105Pa


Question 1134:


Three knives made of steel, plastic and flat wood respectively are placed on a table for an equal amount of time. The steel knife feels coldest to touch because ____________

A. The steel knife has the lowest temperature
B. The plastic and wooden knives have absorbed more heat from the environment than the steel knife
C. Both wooden and plastic knives have lower densities than the steel knife
D. The steel knife conducts heat faster from the finger than the wooden and plastic knives


Question 1135:


The coefficient of linear expansion of aluminum is 23×106K1. If the volume of a pot made with aluminum at temperature T0 is V11, what will be the change in temperature resulting in a decrease of 0.20% in volume of the pot?

A. 87C
B. +487C
C. +428C
D. 29C






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