A 4kg mass initially has speed 2m/s and is accelerated to a speed of 5m/s in 1.5s. How much power was used to accelerate the mass?
回答 (2)
2016-12-12 10:09 am
(change in energy) / time
You have the change in energy (final kinetic energy minus initial kinetic energy).
You have the time.
Divide.
You have the change in energy (final kinetic energy minus initial kinetic energy).
You have the time.
Divide.
2016-12-12 10:11 am
a=(5-2)/1.5=2
f=m*a =4*2=8 kg
f=m*a =4*2=8 kg
收錄日期: 2021-04-23 23:56:27
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