I need help with physics lab report

collisions_1.xlsx

Home >Physics homework help >I need help with physics lab report

Conservation of E and P

Part (1)
Mass of Light Cart:		573.5	±	0.1	grams	= ML ± SML
	Fin length:	6	±	0.1	centimeters	= DL ± SDL
Mass of Heavy Cart:		1691.1	±	0.1	grams	= MH ± SMH
	Fin length:	6	±	0.1	centimeters	= DH ± SDH
Distance between Photogates:		70	±	0.1	centimeters	= Do ± SDo
Part (2)
Data Table 1: Linear Motion of Light Cart
	Time (sec)	uncertainty (sec)
	0.257198	0.03	63.69900	28.71094			-6.819508699	31.4232975764
	0.351391	0.03
	1.425185	0.03			55.70307	21.94047
	1.532899	0.03
Data Table 2: Linear Motion of Heavy Cart
	Time (sec)	uncertainty (sec)
	0.251884	0.03	49.54583	17.37761			-4.74925	14.48465
	0.372984	0.03
	1.763335	0.03			42.30715	12.65707
	1.905155	0.03
Part (3)
Data Table 3: Heavy Cart Incident upon Light Cart (Elastic Collision)
	Time (sec)	uncertainty (sec)
32.6	0.304995	0.03	81.20179	46.64435
	0.378885	0.03
	0.9309	0.03					99.45960	69.96815
	0.991226	0.03
	1.761019	0.03			35.93180	9.14904
	1.928002	0.03
Data Table 4: Elastic Collision
	0.55753	0.64052	0.10917	0.05559	0.28366	0.39910	0.39283	0.4029522852
					0.16471	±	0.7567289715	Joules
Part (4)
Data Table 5: Light Cart Incident upon Heavy Cart (Elastic Collision)
	Time (sec)	uncertainty (sec)
32.6	0.100884	0.03	104.10702	76.65780
	0.158517	0.03
	1.198495	0.03					36.14697	9.25870
	1.364484	0.03
	2.056196	0.03			10.39110	0.78289
	2.633613	0.03
Data Table 6: Elastic Collision
	0.31079	0.45769	0.00310	0.00047	0.11048	0.05660	0.11358	0.0565986673
					0.19721	±	0.4611745369	Joules
Part (5)
Data Table 7: Heavy Cart Incident upon Light Cart (Inelastic Collision)
	Time (sec)	uncertainty (sec)
32.6	0.448185	0.03	66.29908	31.10099
	0.538684	0.03
	1.518384	0.03			40.58657	3.51786
	2.008694	0.03
Data Table 8: Inelastic Collision
	0.37167	0.34870	0.18652	0.03233
					0.18515	±	0.3501950946	Joules
Analysis (1)
Done in Part (2)
Analysis (2)
Data Table 9: Kinetic Frictional Force
light cart	-0.03911	0.18021	0.00696
heavy cart	-0.08031	0.24495	0.00485
Analysis (3)
Done in Parts (3), (4), (5)
Analysis (4)
Data Table 10: Kinetic Frictional Force
Part (3)
Part (4)
Part (5)

Part (3)						±		Joules
Part (4)						±		Joules
Part (5)						±		Joules
Analysis (5)
			(ignore thermal energy generated by kinetic friction)
			°C
Analysis (6)
Summarize results of Analysis (5) & (6)
Analysis (7)
Data Table 11: Heavy Cart Incident upon Light Cart (Elastic Collision)
						±		kg m/sec
Data Table 12: Light Cart Incident upon Heavy Cart (Elastic Collision)
						±		kg m/sec
Data Table 13: Heavy Cart Incident upon Light Cart (Inelastic Collision)
						±		kg m/sec
		0.1	±	0.01	seconds	Assume fractional uncertainty is 10%
Data Table 14: Heavy Cart Incident upon Light Cart (Elastic Collision)
Heavy Cart Incident upon Light Cart (Elastic Collision)
						±		kg m/sec
Light Cart Incident upon Heavy Cart (Elastic Collision)
						±		kg m/sec
Heavy Cart Incident upon Light Cart (Inelastic Collision)
						±		kg m/sec

The total kinetic energy of the carts before collision is more than The total kinetic energy of the carts after collision, and they do agree within their uncertainties. Also, the conservation of energy is being violated because there is alot of energy is missing from the final kinetic energy.