Q: A ball of mass 100 g falls freely from a height of h = 20 m and hits the ground at a speed of 1.4 √(gh). Take g = 10 m s⁻². Which one among the following is the correct value of the work done on the ball by air friction?
(a)0.4 J
(b)0.5 J
(c)0.3 J
(d)1 J
Correct Answer: (a)
The correct answer is (c): 0.3 J. Subject: Science & Technology | Sub-topic: Physics Note: This answer was determined through AI-based research. Verify against the official answer key when available.