Final Exam Spring 1996 Answers

 1) momentum is conserved but kinetic energy is not conserved
 2) F1 is equal to F2
 3) measuring the period and orbital radius of one of Jupiter's moons
 4) displacement
 5) none of these
 6) 5 m/s
 7) 5 J
 8) the linear velocity of the point of contact, relative to the
    inclined surface, is zero
 9) neither (they arrive together)
10) due North
11) 6 kg.m^2/s
12) 5.6 m/s^2
13) 11.1 rad/s^2
14) 2 m/s
15) F is the total external force and m is the total mass of the system
16) a net external force must be acting on the system
17) 0.05
18) 8.1 kN
19) the system will accelerate at a<g
20) 10 kg.m/s

Partial Credit:
5.4 m/s, 4 m/s left, 0 m/s ___, T=87 N, a=1.1 m/s^2, 45.4 m/s

Short Answer:
rad/s^2
rad/s
kg.m^2/s
none
kg.m/s
J = joule = kg.m^2/s^2
1/s
kg.m/s
kg.m^2
J
W = watt = J/s
N/m = kg/s^2
N.m= kg.m^2/s^2
J