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Notes:
1grain = 64.8mg
1newton = 100g
= 300 m/s (speed)
= 30 × 100
= 3,000g (rifle mass)
= 5-g × 64.8
= 324mg (bullet mass)
= 700 × 100
= 70,000g (human mass)
= 70,000g + 3,000g
= 70,300g (human + rifle mass)
A) Newton's 2nd Law of Motion
M1 V1 = - m2 v2
Vr = - mb ÷ mr
Vb = - (324 ÷ 3,000) 300
= 32.4 m/s
B) Newton's 2nd Law of Motion
M1 V1 = - m2 v2
Vr = - mb ÷ mr
Vb = - (324 ÷ 70,300) 300
= 1.39 m/s
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