Physics 1 Problem Solutions 115

Physics 1 Problem Solutions 115 - Chapt 12 Rotational...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapt. 12 Rotational Dynamics 111 012 qfull 00612 2 3 0 moderate math: LLNL door and torque 2 Extra keywords: (HR-243:53p) 3. The shield door of the neutron test facility at Lawrence Livermore National Laboratory (where they design the bombs) has been upgraded hypothetically—though not in reality. This most massive hinged door: mass 64 , 000 kg, rotational inertia about its hinge axis 1 . 25 × 10 5 kg m 2 , door width 3 . 2 meters. Assuming zero friction, what constant force perpendicular to the door at its outer edge is needed to move the door 90 ◦ in 20 s? Show your calculations. 012 qfull 00640 3 3 0 tough math: Pippa on merry-go-round 4. Wee Pippa Passing runs up to a playground merry-go-round, initially at rest, and jumps radially onto the rim. a) What is the torque she exerts about the rotational axis of the merry-go-round? Does the merry-go-round start to rotate? Why or why not? Does the merry-go-round move at all?...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online