Question

how do I calcualte work and average velocity with only this information presented?

module 1 lab completed KL - O Search out References Mailings Review View Help A Aa- DE ALI ADAE. . AaBbCD AaBbCcDc AaBbc AaBbc 1 Normal 1 No Spac... Heading 1 Heading 2 Paragraph Styles LSM w powergewpow CLOU LUTET Sample Data: Use this to complete your calculations. Please show the formula(s) you used to complete the assignment. Group Member Mass Time Av Vel Power PE Ht change Work (1) (w) Charlie 801.0 81.65 7.80 4.76 1906.38 Dan 512.1 52.2 8.56 4.76 1218.80 Work = F xD Power = WAT PE=/ weight x height (Work and PE should be very close - slight differences would be attributed to measurement errors) 8

Answer 1

Work, W = ½ FH ( for each member, half of the actual height change need to be taken, hence the term ½ present in the formula for the work.)

Power, P = work/time = W/t

Potential energy, PE = ½ weight x height (for each member, half of the actual height change need to be taken, hence the term ½ present in the formula for the work.)

Power is the dot product of force and velocity: P = F.V

For Charlie:

Work, W = ½ FH = ½ x 801 x 4.76 = 1906.38 J

Power, P = W/t = 1096.38/7.80 = 140.56 W

P = F.V , average velocity, V = P/F = 140.56/801 = 0.18 m/s

For Dan:

Work, W = ½ FH = ½ x 512.1 x 4.76 = 1218.80 J

Power, P = W/t = 1218.80/8.56 = 142.38 W

P = F.V , average velocity, V = P/F = 142.38/512.1 = 0.28 m/s

Group member	Wt in N	mass in kg	time in s	Av Vel in m/s	Ht change in m	work in J	power in W	Pe in J
Charlie	801.0	81.65	7.8	0.18	4.76	1906.38	140.56	1906.38
Dan	512.1	52.2	8.56	0.28	4.76	1218.80	142.38	1218.8