Help!
When one part of a vibration causes
air particles to spread out, they form a

A. compression

B. sound wave

C. diffraction

D. rarefaction

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2

answer; equivalent to a one(1) horsepower motor;