1. Person #1 pulls a 410N piece of luggage a distance of 150m, Person #2 pulls a 200N piece of luggage a distance of 300.m?
a) Calculate the work done by person #1:
b) Calculate the work done by person #2:
c) Who does more work and WHY??
d) If they both take the same amount of time, who uses more power and WHY??
e) If person #1 uses 410 watts of power to move the luggage, how long did it take to
cover the 150m distance?
Heres the formulas:
Work: W = Force(N) x Distance(m) ; Units = Joules(J)
Weight = Mass x Gravity = mg = Force ; Units = Newtons(N)
(g=9.8m/s2)
Power = Work(J) ; Units = Watts(W)
Time(s)
Momentum = mass(kg) x velocity(m/s); Units = (kg)(m)
s
Kinetic Energy:
KE = (1/2 x mass(kg) x velocity(m/s)2 = ½mv2 = mv2
Units = Joules(J) 2
Potential Energy:
PE = mgh=mass(kg) x gravity(m/s2) x height(m);Units=(Joules)
Answers: 1
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1. Person #1 pulls a 410N piece of luggage a distance of 150m, Person #2 pulls a 200N piece of lugga...
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