B- the acceleration is greater for the more massive rock
Answer:
0.5 m/s2
Explanation:
accelration formula : final velocty - starting velocity divided by time
Answer:

Explanation:
Radius of the pollen is given as

Volume of the pollen is given as



mass of the pollen is given as


so weight of the pollen is given as



Now electric force on the pollen is given



now ratio of electric force and weight is given as

