Post Utme Physics Past Questions and Answers

Question 811:

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A brick at rest on horizontal table is pulled by a horizontal cord, as shown in fig. 2 .
The force of frictlon on the brick.

A. Increase If the pull Increases hut the brick does not movo
B. Is directly horizontal to the right
C. Decreases If an Identical brick is placed on the first
D. Is zero if the brick is pulled hard enough to make it slide
E. Change If the brick is turned on Its slde

Question 812:

The force with which an object is attracted 10 the earth is called its ____________

A. Acceleration
B. Mass
C. Gravity
D. Impure
E. Weight

Question 813:

The refractive Index of a liquid is 1.5. if the velocity of light in the liquid is ____________

A. \(1.5 \times 10^{3} \mathrm{~ms}^{-1}\)
B. \(2.0 \times 10^{8} \mathrm{~ms}^{-1}\)
C. \(3.0 \times 10^{8} \mathrm{~ms}^{-1}\)
D. \(4.5 \times 10^{8} \mathrm{~ms}^{-1}\)
E. \(9.5 \times 10^{8} \mathrm{~ms}^{-1}\)

Question 814:

If the relative density of a metal is 19 , what will be the mass of \(20 \mathrm{~cm}\) of the metal when immersed in water?

A. \(380 \mathrm{~g}\)
B. \(400 \mathrm{~g}\)
C. \(360 \mathrm{~g}\)
D. 39g
E. \(180 \mathrm{~g}\)

Question 815:

Which of the following statements about liquid pressure is NOT correct? The pressure ____________

A. At a point in a liquid is proportlonal to the depth
B. At any point in a liquid is the same at the same level
C. Is exerted equally in all directions at any polnt
D. Of a liquid at any point on me wall of its