# The diagram shows a circular piece cut out of a

• Test Prep
• MasterChief23
• 6
• 100% (7) 7 out of 7 people found this document helpful

This preview shows page 3 - 6 out of 6 pages.

5. The diagram shows a circular piece cut out of a larger circular metal plate. State where the center of mass of the final object lies. A. at A B. at B C. between A and B D. between B and C E. at C Full plate’s cm is at B and when negative mass added at A, cm will shift to right, Actually to R/3 to right of B. R 2R A B C
6. The figure shows a system of three particles on which external forces act. The magnitude and direction of two of them are shown. If the center of mass of this three-particle system is to move with constant velocity to the right, find the magnitude and direction of the force that must act on it. y 2
7. (5 pts.) An object at rest explodes into three pieces. Two equal masses fly off with equal speeds to the NE and NW directions. Which way does the third piece move?
Resultant p of first two to N, so third piece must have p to S.
Problem 1 The figure to the right shows a block S with mass M . The block is free to move along a horizontal frictionless surface and connected, by a massless cord that wraps over a frictionless pulley with mass m and radius r ( I=mr 2 /2) to a second block H also of mass m . The hanging block H falls as the sliding block S accelerates to the right. a) ( 6 pts.) Draw force diagrams for blocks S and H and the pulley.