Internal,covert processes
Answer:
Whenever you see the delta symbol infront of another, it always represents change. In other words:
Δu = u_f - u_i
- u_i means "initial velocity"
- u_f means "final velocity"
And in general, ΔX means Xfinal - Xinitial
<u>MOMENTUM IS CONSERVED</u> (law of Nature)
That means that momentum can move from one object to another object, but it's never created or destroyed. The amount of momentum AFTER something is the same as it was BEFORE.
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<u>Before:</u>
(ball momentum = 12), (pin momentum = 0)
Ball + Pin = 12 unts
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<u>After:</u>
Momentum is conserved.
Ball + Pin still has to be 12 units
Ball = 8 units
So Pin has to be the other <em>4 units</em>.