PH-272
Friction and air resistance
Physics · Secondary 3 · Medium · Friction and air resistance
A 0.20 kg ball is dropped from rest and falls vertically. When its speed reaches 8.0 m/s, the upward air resistance on the ball is 1.0 N. Take gravitational field strength as 10 N/kg. What is the resultant force on the ball at this instant?
- 1.0 N downward
- 3.0 N downward
- 1.0 N upward
- 2.0 N upward
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