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Post Utme Physics Past Questions and Answers

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Post Utme Physics Past Questions

Question 116:


In a resonance tube experiment, a tube of fixed length is closed at one end and several turning forks of increasing frequency used to obtain resonance at the open end. If the turning fork with the lowest frequency which gave resonance had a frequency f 1and the next turning fork to give resonance had a frequency f2 find the ratio f2:f1

A. 1/2
B. 3
C. 9
D. 8


Question 117:


I. Its velocity is constant
II. No work is done on the body
III. It has constant acceleration directed away from the centre
IV. The centripetal force is directed towards the centre

Which combination above is true of a body moving with constant speed in a circular track?

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


Question 118:


A machine requires 1000 J of work to raise a load of 500 N through a vertical distance of 1.5 m. Calculate the efficiency of the machine.

A. 80%
B. 75%
C. SO%
D. 33%


Question 119:


Two forces whose resultant is 100 N are at right angles to each other. if one of them makes an angle of 30 with the resultant, find the magnitude of the other force.

A. 8.66 N
B. 86.6 N
C. 50.0 N
D. 5.0 N


Question 120:


A body of weight WN rests on a smooth plane inclined at an angle θ to the horizontal.
The component of the weight down the slope is ____________

A. Wsinθ
B. Wcosθ
C. Wtanθ
D. Wsecθ






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