Massachusetts Institute of Technology  Physics Department
Physics  8.01
Assignment #6
October 22, 1999.
It is strongly recommended
that you read about a subject
before
it is covered in lectures.
Lecture Date
Material Covered
Reading
Mon 10/25
Exam #2
Handout of 10/18
#19 Wed 10/27
Rotating Rigid Bodies  Moment of Inertia
Page 296–309
Parallel Axis and Perpendicular Axis Theorem
Rotational Kinetic Energy  Flywheels
Handout of 10/27
Neutron Stars  Pulsars
Take Notes
#20 Fri 10/29
Angular Momentum  Torques
Page 310–317, 327–329
Conservation of Angular Momentum
Page 336 (Ex. 7), Page 338 (Ex. 9)
Spinning Neutron Stars  Stellar Collapse
Take Notes
Due Monday, Nov 1, before 4 PM in 4339B.
6.1
Serious Car Accident
– page 291, problem 13
6.2
Colliding Bobs
– page 292, problem 23
6.3
Sliding on Ice
John and his friend, Nancy, sit motionless on sleds on frictionless ice. John slides a 10 kg block across
the ice to Nancy at 3 m/sec relative to his sled (i.e. after the block is released, the relative velocity
of the block relative to his sled is 3 m/sec). Nancy catches it and slides it back to John at the same
speed of 3 m/sec relative to her own sled. John and his sled (without the 10 kg block) together have
a mass of 100 kg, and Nancy and her sled together have a mass of 80 kg.
a) What is the speed of John’s sled and what the speed of the block after John releases the block?
b) What is the speed of Nancy’s sled immediately after she catches the block?
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 Spring '08
 Staff
 Kinetic Energy, Nancy, Total kinetic energy

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