Question

8. Which of the following case has the highest magnitude of net force acting on the body?

• A. A drop of rain falling down with a constant speed.
• B. A cork of mass $10g$ floating on water
• C. A car moving with a constant velocity of $30km/h$ on a rough road.
• D. An electron revolving with a constant speed inside a hydrogen atom

Answer 1

Answer: (D)

A rotating electron has a centripetal acceleration, whereas all other cases have constant velocity or zero acceleration