- #1
bobie
Gold Member
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Suppose a bowler is standing on the edge of platform of a train speeding at 100 m/s, a bowl in his hand (m=1Kg) has KE 5000 J.
The bowler throws his ball at 10 m/s giving the ball 50 J of KE , so the balls has total KE 5050 J, right?.
Suppose now that the ball falls outside the platform on the earth, hitting a ball of identical mass, this should fly off at 110 m/s, is this right?..
..but, if so, the second ball has 6050 J of KE, where does the missing 1000 J of KE come from?
The bowler throws his ball at 10 m/s giving the ball 50 J of KE , so the balls has total KE 5050 J, right?.
Suppose now that the ball falls outside the platform on the earth, hitting a ball of identical mass, this should fly off at 110 m/s, is this right?..
..but, if so, the second ball has 6050 J of KE, where does the missing 1000 J of KE come from?