INSTRUCTIONS: - Show the 'free body diagrams' completely. - Show all equations obtained from the free body diagrams, and how equations are derived from the FBD. - Show all solutions completely. • A movie stuntman (mass 80.0 kg) stands on a window ledge 5.0 m above the floor. Grabbing a rope attached to a chandelier, he swings down to grapple with the movie's villain (mass 70.0 kg), who is standing directly under the chandelier. (Assume that the stuntman's center of mass moves downward 5.0 m. He releases the rope just as he reaches the villain.) (a) With what speed do the entwined foes start to slide across the floor? (b) If the coefficient of kinetic friction of their bodies with the floor is uk = 0.250, how far do they slide? 5,0 m Start A spring of negligible mass has force constant k = 800 N/m. (a) How far must the spring be compressed for 1.20 J of potential energy to be stored in it? (b) You place the spring vertically with one end on the floor. You then lay a 1.60-kg book on top of the spring and release the book from rest. Find the maximum distance the spring will be compressed. 1.00 m m = 80.0 kg A 45.0 kg woman stands up in a 60.0 kg canoe 5.00 m long. She walks from a point 1.00 m from one end to a point 1.00 m from the other end. If you ignore resistance to motion of the canoe in the water, how far does the canoe move during this process? Hint: het external force is zero, momentum of CENTER of MASS is constantly at rest, and therefore position of center of mass does not change. m = 70.0 kg 3.00 m Finish 1.00 m
INSTRUCTIONS: - Show the 'free body diagrams' completely. - Show all equations obtained from the free body diagrams, and how equations are derived from the FBD. - Show all solutions completely. • A movie stuntman (mass 80.0 kg) stands on a window ledge 5.0 m above the floor. Grabbing a rope attached to a chandelier, he swings down to grapple with the movie's villain (mass 70.0 kg), who is standing directly under the chandelier. (Assume that the stuntman's center of mass moves downward 5.0 m. He releases the rope just as he reaches the villain.) (a) With what speed do the entwined foes start to slide across the floor? (b) If the coefficient of kinetic friction of their bodies with the floor is uk = 0.250, how far do they slide? 5,0 m Start A spring of negligible mass has force constant k = 800 N/m. (a) How far must the spring be compressed for 1.20 J of potential energy to be stored in it? (b) You place the spring vertically with one end on the floor. You then lay a 1.60-kg book on top of the spring and release the book from rest. Find the maximum distance the spring will be compressed. 1.00 m m = 80.0 kg A 45.0 kg woman stands up in a 60.0 kg canoe 5.00 m long. She walks from a point 1.00 m from one end to a point 1.00 m from the other end. If you ignore resistance to motion of the canoe in the water, how far does the canoe move during this process? Hint: het external force is zero, momentum of CENTER of MASS is constantly at rest, and therefore position of center of mass does not change. m = 70.0 kg 3.00 m Finish 1.00 m
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Transcribed Image Text:INSTRUCTIONS:
Show the 'free body diagrams' completely.
- Show all equations obtained from the free body diagrams, and how equations
are derived from the FBD.
- Show all solutions completely.
A movie stuntman (mass 80.0 kg) stands on a window ledge 5.0 m
above the floor. Grabbing a rope attached to a chandelier, he
swings down to grapple with the movie's villain (mass 70.0 kg),
who is standing directly under the chandelier. (Assume that the
stuntman's center of mass moves downward 5.0 m. He releases
the rope just as he reaches the villain.) (a) With what speed do the
entwined foes start to slide across the floor? (b) If the coefficient
of kinetic friction of their bodies with the floor is uk = 0.250, how
far do they slide?
5,0 m
Start
1.00 m
m
A spring of negligible mass has force constant k = 800 N/m. (a) How far must the spring be
compressed for 1.20 J of potential energy to be stored in it? (b) You place the spring vertically
with one end on the floor. You then lay a 1.60-kg book on top of the spring and release the book
from rest. Find the maximum distance the spring will be compressed.
80.0 kg
A 45.0 kg woman stands up in a 60.0 kg
canoe 5.00 m long. She walks from a point
1.00 m from one end to a point 1.00 m
from the other end. If you ignore
resistance to motion of the canoe in the
water, how far does the canoe move
during this process? Hint: het external
force is zero, momentum of CENTER of
MASS is constantly at rest, and therefore position of center of mass does not change.
3,00 m
m = 70.0 kg
Finish
1.00 m
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