Block A of mass 4.00 kg moves along a horizontal surface, and collides elastically with block B, which is 7.00 kg and is initially at rest. Block B then reaches an elastic spring with spring constant k = 225 N/m, and compresses the spring a maximum distance of 0.65 m. Find the initial and final speeds of block A. (The surface is everywhere frictionless.) A B)

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M2.1 please answer all problems and also write out all steps and reasoning. The second image shows the correct answers. 

M2.1. Block A of mass 4.00 kg moves along a horizontal surface, and collides elastically with
block B, which is 7.00 kg and is initially at rest. Block B then reaches an elastic spring
with spring constant k = 225 N/m, and compresses the spring a maximum distance of
0.65 m. Find the initial and final speeds of block A. (The surface is everywhere
frictionless.)
|A|
Transcribed Image Text:M2.1. Block A of mass 4.00 kg moves along a horizontal surface, and collides elastically with block B, which is 7.00 kg and is initially at rest. Block B then reaches an elastic spring with spring constant k = 225 N/m, and compresses the spring a maximum distance of 0.65 m. Find the initial and final speeds of block A. (The surface is everywhere frictionless.) |A|
1. Block A of mass 4.00 kg moves along a horizontal surface, and collides elastically with
block B, which is 7.00 kg and is initially at rest. Block B then reaches an elastic spring
with spring constant k = 225 N/m, and compresses the spring a maximum distance of
0.65 m. Find the initial and final speeds of block A. (The surface is everywhere
frictionless.)
|A|
KE; + U: :
kEe + Up
mB
+ 0 =0 +t I
225 Nm
· : 3.69 mls
0.65 m
V 7.00 KS
MAVA: +
4.00 VAi ? 4.00 VAf
+ 7.00V,
E
Reversal of relet ive velocity?
Va: - Ye : -lVAt - Ves)
Va: : - Vat + Vef
VAi
{4.00 VA: - - 4.00 VaE
4.00Ved
Add ;
8.00 Va: : 0 + 11.00 VBE
Vai :
l1.00(3.64 m/): S.07 "s
8.00
VAf: Ver - VAi
BE
: ?.69 mys- S.07 mls
(. ?8 mla
Transcribed Image Text:1. Block A of mass 4.00 kg moves along a horizontal surface, and collides elastically with block B, which is 7.00 kg and is initially at rest. Block B then reaches an elastic spring with spring constant k = 225 N/m, and compresses the spring a maximum distance of 0.65 m. Find the initial and final speeds of block A. (The surface is everywhere frictionless.) |A| KE; + U: : kEe + Up mB + 0 =0 +t I 225 Nm · : 3.69 mls 0.65 m V 7.00 KS MAVA: + 4.00 VAi ? 4.00 VAf + 7.00V, E Reversal of relet ive velocity? Va: - Ye : -lVAt - Ves) Va: : - Vat + Vef VAi {4.00 VA: - - 4.00 VaE 4.00Ved Add ; 8.00 Va: : 0 + 11.00 VBE Vai : l1.00(3.64 m/): S.07 "s 8.00 VAf: Ver - VAi BE : ?.69 mys- S.07 mls (. ?8 mla
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