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kcameronanderso
31.07.2019 •
Physics
A7.14 kg bowling ball moves at 1.92 m/s. how fast must a 2.3 g ping pong ball move so that the two balls have the same kinetic energy?
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Ответ:
Therefore we can substitute values in:
The kinetic energy of the bowling ball is
We can now substitute this in for the ping pong ball (note the mass of the ping pong ball is 0.0023kg as Ek is kgm^2s-1):
v=sqrt(11443.87)=106.97m/s
=107m/s To 3sf as the values in the question are given to 3sf.
Ответ: