Why is it one sec?,

  • #1
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2

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can you help me with this, please?
 

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  • #2
CWatters
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Firstly it doesn't say "one second" it says "per second" which is a rate.

Momentum = mass * velocity
so
Momentum per second would be equal to mass * velocity / time

Velocity/time = acceleration.

can you do the rest?
 
  • #3
134
12
Force is the change in momentum per unit time.
F=ma (m=mass a=acceleration)
a= (vf-vi)/t
Replacing a into the force equation:

F=m (vf-vi)/t
Which is change in momentum per unit time.
 
  • #4
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