Post Utme Physics Past Questions and Answers

Question 466:

A pole AB of length 10 m weighs 800N and has its centre of gravity 4 m from the end A, and lies on horizontal ground.
The least vertical force required to lift its end B is ____________

A. 320N
B. 80N
C. 2000 N
D. 20 N

Question 467:

A metre rule is found to balance horizontally at the 48 cm mark. When a body of mass 60 g is suspended at the 6 cm mark the balance point shifts 136 to the 30 cm mark. The mass of the metre rule is:

A. 1.33g
B. 80g
C. 3.33g
D. 45 g

Question 468:

The elastic limit of a material is ____________

A. The yield point
B. The limit of stress within which the strain in the material completely disappears when the stress is removed
C. A point at which a sudden increase elongation occurs with only a small increase in tension.
D. None of the above.

Question 469:

A 10 g mass placed on the pan of a spring balance causes an extension of 5 cm.
If a 15 g mass is placed on the pan of the same spring balance, the extension produced is ____________

A. 2,0 cm
B. 30.0cm
C. 7.5 cm
D. 1.5 cm

Question 470:

Which of the following does not reduce surface of a liquid?
I. addition of impurities like detergent or alum to the liquid
II. heating the liquid
III. cooling the liquid

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