Physics Past Questions and Answers

A block weighing 15N rests on a flat surface and a horizontal force of 3N is exerted on it. Determine the friction force on the block

A 0.3N
B 0.5N
C 3.0N
D 5.0N

Question 787:

Which of the following equations represents the distance x, travelled by a body moving on a straight road with a constant speed? [The other symbol have their usual meanings]

A X = Ut + \(\frac{1}{2}t^2\)
B X = Ut
C X = \(\frac{V^2 - U^2}{2a}\)
D X = -\(\frac{1}{2} at^2\)

Question 788:

The amplitude of the motion of a body performing simple harmonic motion decreases with time because

A Friction force dissipate the energy of motion
B The frequency of oscillation varies with time
C The period of oscillation varies with time
D Energy is supplied by some external agency

Question 789:

The amplitude of a particle executing simple harmonic motion in 5cm while its angular frequency is 10 rad s^-1. calculate the magnitude of the maximum acceleration of the particle

A 0.25ms^-2
B 0.50ms^-2
C 2.00ms^-2
D 5.00ms^-2

Question 790:

The time rate of change of momentum is

A Impulse
B Force
C Power
D Pressure