34. State two ways in which resonance differs from forced vibrations.​

Explanation

Resonance:

1. The amplitude of vibration is very large.

2. The vibrations of the body are in phase with the external periodic force.

Forced Vibrations:

1. The amplitude of vibration is usually small.

2. The vibrations of the body are not in phase with the external periodic force.

probably not if net force is zero

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg