WAEC Physics Past Questions & Answers - Page 115

572.

Simple harmonic oscillator has a period of 0.02s and amplitude of 0.25m. Calculate the speed in ms-1 at the centre of the oscillation

A.

125\(\pi\)

B.

25.00\(\pi\)

C.

100.00 \(\pi\)

D.

400.00\(\pi\)

Correct answer is B

V = WX = \(\frac{2\pi \times 0.25}{0.02} = 25\pi\)

573.

Which of the following statements best describes a rigid body? A body which

A.

is not equally deformed

B.

when deformed regains it shape

C.

is brittle

D.

when deformed remains deformed

Correct answer is A

No explanation has been provided for this answer.

575.

The average speed of an object is determined by dividing the sum of its initial and final speeds by two only when the acceleration is

A.

changing

B.

uniform

C.

increasing

D.

decreasing

Correct answer is B

No explanation has been provided for this answer.