Post Utme Physics Past Questions and Answers

Question 1301:

A uniform rod PQ of mass \(2 kg\) and length of \(1 m\) is pivoted at the end \(P\). if a load of \(14 N\) is placed on it at the centre, find the force that should be applied vertically upwards at \(Q\) to maintain the rod in equilibrium

A. \(7 N\)
B. \(28 N\)
C. \(68 N\)
D. \(17 N\)

Question 1302:

The energy contained in wire when it is extended by \(0.02 m\) by a force of \(500 N\) is ____________

A. \(10^{4} J\)
B .10^{3} J\)
B. \(10 J\)
C. \(5 J\)

Question 1303:

What is the acceleration due to gravity ' \(g\) ' on the moon, if \(g\) is \(10 ms ^{-2}\) on the earth?

A. \(0.74 ms ^{-2}\)
B. \(0.1 ms ^{-2}\)
C. \(10.0 ms ^{-2}\)
D. \(1.67 ms ^{-2}\)

Question 1304:

A \(5 Kg\) block is released from rest on a smooth plane inclined at an angle of \(30^{\circ}\) to the horizontal. What is the acceleration down the plane?

A. \(5.0 ms ^{-2}\)
B. \(8.7 ms ^{-2} \)
C. \(25.0 ms ^{-2}\)
D. \(5.8 ms ^{-2}\left[g=10 ms ^{-2}\right]\)

Question 1305:

A rectangular metal block of volume \(10^{-6} m ^{3}\) at \(273 K\) is heated to \(573 K\), if the coefficient of linear expansion is \(1.2\) \(\times 10^{-5} K ^{-1}\), the percentage change of its volume is ____________

A. \(1 .5 \%\)
B. \(1.1 \%\)
C. \(0.1 \%\)
D. \(0.4 \%\)