Elastic Collisions Momentum (4 PTS)

Collision	Mred (kg)	Mblue (kg)	vredinitial (m/s)	vblueinitial (m/s)	vredfinal (m/s)	vbluefinal (m/s)	Ptotal initial (kg/m/s) P=m.v	Ptotal final (kg/m/s) P=m.v
1a	1	2	10	2	-0.7	7.30	Pi=(1x10+2x2)=(10+4)=14	Pf=(1.x-.7)+(2x7.3) =(-.7+14.6)=14
2a	1	3	7	-2	-6.5	2.5	Pf=(1x7)+(3x-2)=(7+-6)=1	Pf=(1x-6.5)+(3x2.5) =(-6.5+7.5)=1
3a	1	2	10	3	0.7	7.7	1*10+2*3=10+6=16	1*-.7+2*7.7=-.7+14.6
4a	2	3	10	-5	-8	7	2*10+3*-5=20+(-15)=5	2*-8+3*7=-16+21=5

Elastic Collisions Kinetic Energy- (4 PTS)

Collision	KEredinitial(J) (KE)=12mv2(J)	KEblueinitial(kg)	KEtotalinitial(J)	KEredfinal(J)	KEbluefinal(J)	KEtotalfinal(kg)
1b	=1/2x1x 10^2 =50	=1/2x2x2^2=4	50+4=54	=1/2x1x(-.7)^2 =.245	=1/2x2x(7.3)^2 =53.29	=.245+53.29=53.54
2b	=1/2x1x7^2 =24.5	=1/2x3x(-2)^2 =6	=24.5+6 =30.5	=1/2x1x(-6.5)^2 =21.125	=1/2x3x(2.5)^2 =9.375	=21.125+9.375 =30.5
3b	=*1*10^2 =50	=*2*3^2 =9	50+9=59	=*1*0.7^2 =0.245	=*2*7.7^2 =59.29	.245+59.29= 59.535
4b	=*2*10^2 =100	=*3*(-5)^2 =-37.5	100+(-37.5)=62.5	=*2*-8^2 =73.5	=*3*7^2 =73.5	73.5+73.5 =147

Q1 Was momentum conserved in this collision? How do you know? (1 PTs)

Q2 Was Kinetic Energy conserved in this collision? How do you know? (1 PTs)

Inelastic Collisions Momentum (4 PTS)

Collision	Mred (kg)	Mblue (kg)	vredinitial (m/s)	vblueinitial (m/s)	vredfinal (m/s)	vbluefinal (m/s)	Ptotal initial (kg/m/s) P=m.v	Ptotal final (kg/m/s) P=m.v
5a	1	1	10	0	5	5	(1x10)+(1x0)=10+0 =10	=(1+1)x5 2x5=10
6a	1	3	8	-5	-1.7	-1.7	(1x8)+(3x-5) =8-15=-7	(1+3)x-1.7 = -6.8
7a	2	3	6	3	4.2	4.2	(2*6)+(3*3)=12+9=21	8.4+12.6=21
8a	2	3	10	-5	1	1	(2*10)+(3+(-5))=20-15=5	2+3=5

Inelastic Collisions Kinetic Energy (4 PTS)

Collision	KEredinitial(J) (KE)=12mv2	KEblueinitial(kg)	KEtotalinitial(kg)	KEtotalfinal(kg)
5b	=1/2(1)x(10)^2=50	=1/2x1x(0)^2=0	50+0=50	=1/2 (1+1)x(5)^2 =25
6b	=1/2(1)x(8)^2=32	. (3)x(-5)^2=37.5	32+37.5=69.5	=1/2 x(1+3)x (-1.7)^2 =5.78
7b	(2)(6)^2=36	(3)(3)^2+13.5	(3)(4.2)^2=17.64	(3)(4.2)^2=26.46
8b	(2)(10)^2=100	(3)(-5)^2=37.5	(2)(1)^2=1	(3)(1)^2=1.5

Q4 . Was momentum conserved in this collision? How do you know? (1 PTs)

Q5 . Was Kinetic Energy conserved in this collision? How do you know? (1 PTs)