a tennis ball is served horizontally from 2.4 above the ground at 30 m/s the net is 12 m away and 0.9m high will be clear the net? a. 0.64m b. 1.62m c 2.72m d.none ans is optn B
Medical Student , 7 Years ago
Grade 12th pass
1 Answers
Arun
Last Activity: 7 Years ago
The time for the ball to reach the net: distance = speed x time t = 12/30 t = 0.4 seconds
a) Height of ball after 0.4 seconds: h = 2.4 - ut - 1/2 at²; u = 0 h = 2.4 - 1/2 x 9.81 x (0.4)² h = 1.62 m