quiz_21apr10

# quiz_21apr10 - Quiz 8 Name:_ 1)  Write down the...

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

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Quiz 8 Name: _____________________ 1)  Write down the deﬁni3on for torque τ = rxF 2) A person weigh3ng 60 kg stands at the center of a symmetric boat weighing 500 kg ﬂoa3ng on a fric3onless, current ­less, s3ll pool as shown in the ﬁgure below. The person starts to walks 1m to the right. Will the center ­of ­mass of the boat/person system a)  Move to the right b) move to the leP. C) stay in the same place d) none of the above 3) Imagine a disk lying in the plane of this sheet of paper and spinning counter clockwize. Deﬁne the posi3ve x axis as in the plane of the paper, poin3ng to your right. Deﬁne the posi3ve y axis as in the plane of the paper, poin3ng towards the top of the sheet. Deﬁne the z axis as perpendicular to the plane of the paper, towards you. What is the direc3on of the angular velocity? A) + x axis b) –x axis c) +y axis d) –y axis e) +z axis f) –z axis g) none of the above ...
View Full Document

## This document was uploaded on 12/28/2011.

Ask a homework question - tutors are online