Post Utme Physics Past Questions and Answers

Question 36:

Which of the of the following is a measurement taken with Venier callipers?

A. \(2.0 \mathrm{~cm}\)
B. \(2.00 \mathrm{~cm}\)
C. \(2.000 \mathrm{~cm}\)
D. \(2.0000 \mathrm{~cm}\)

Question 37:

Which one of the following statements concerning the magnetic force on a charged particle in a magnetic field is true?

A. It is a maximum if the particle is stationary.
B. It is a maximum if the particle moves parallel to the field.
C. It acts in the direction of motion for a positively charged particle.
D. It depends on the component of the particle's velocity that is perpendicular to the field.

Question 38:

A ball is thrown up into the air. At the highest point of its trajectory the ball ____________

A. Is accelerating downwards
B. Has zero acceleration
C. Is accelerating upwards
D. Is still moving upwards

Question 39:

A ball of mass \(200 \mathrm{~g}\) moving with a velocity of \(8 \mathrm{~m} / \mathrm{s}\) collides and sticks with another ball of mass \(300 \mathrm{~g}\) moving in the same direction with velocity \(4 \mathrm{~m} / \mathrm{s}\). What is the common velocity of the balls after the collision?

A. \(5.6 \mathrm{~ms}^{-1} \)
B. \(2.8 \mathrm{~ms}^{-1} \)
C. \(11.2 \mathrm{~ms}^{-1} \)
D. \(1.4 \mathrm{~ms}^{-1} \)

Question 40:

A boy holds the end of a rubber cord from which hangs a solid metal ball, if the boy whirls the ball in a horizontal circle, keeping his hand still. If the rubber cord breaks when the ball is at a point on the circle, in what direction will the ball move?

A. Towards the hand of the boy
B. Away from the hand of the boy
C. In the direction of the tangent to the circle at the point of break
D. None of the above