Post Utme Physics Past Questions and Answers

Question 1066:

If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called

A. Doppler effect
B. Resonance
C. Refraction
D. Diffraction of sound

Question 1067:

The period of vibration of a wave of wavelength \(30 m\) moving at a speed of \(300 m / s\)

A. 10s
B. 270s
C. 330s
D. 900s

Question 1068:

A \(10.0 kg\) mass is dragged along a horizontal table by a \(60 N\) force. The force is inclined at angle \(30^{\circ}\) to the horizontal, and the coefficient of dynamic friction between the mass and the table is \(0.15\). Calculate the acceleration of the mass.
[Take \(g =10 m / s ^{2}\) ]

A. \(3.7 m / s ^{2}\)
B. \(4.5 m / s ^{2} \)
C. \(5.0 m / s ^{2}\)
D. \(6.7 m / s ^{2}\)

Question 1069:

A body of mass \(M kg\) is located \(0.5 m\) from a body of mass \(2 M kg\). At the same time, it is \(0.75 m\) from a third body of mass \(3 M kg\) and \(0.9 m\) from a fourth body of mass \(5 M kg\). Which of the three bodies exerts the least gravitational force of attraction on the body of mass \(M kg\) ?

A. 2M kg
B. \(3 M kg\)
C. \(5 M kg \)
D. All forces equal

Question 1070:

Which of the following statements is true of a body moving with simple harmonic oscillation about its equilibrium position?

A. The velocity is maximum when the body is passing through the equilibrium position
B. The velocity is minimum when the body is passing through the equilibrium position.
C. Acceleration is maximum when body is passing through the equilibrium position
D. Acceleration is constant throughout the period of motion