PART A: Write in the space provided whether the statemen I. For a rigid body wit
ID: 2087680 • Letter: P
Question
PART A: Write in the space provided whether the statemen I. For a rigid body with constant rotational velocity w, any point on the body has a constant tangential accelera tion of 2. The elastic potential energy of a compressed spring is 3. If a system of both conservative and nonconservative forces act on a rigid body, the total work done by the conservative forces equals to the change in kinetic energy 4. 5. 6. During an impact, impulsive forces can be neglected from the impulse equation If the coefficient of restitution is equal to 1, the principle of conservation of linear momentum does not apply When two particles A and B have a central impact, the internal impulse between them is equal, opposite and collinear 7. Planar motion of a body occurs when all particles of the rigid body move along paths which are equidistant to a fixed plane When a rigid body rotates about a fixed axis, all particles of the body except those which lie on the axis of rotation, move along circular paths. All points in a rigid body subjected to either rectilinear or curvilinear translation move with the same velocity and acceleration 8. 9. 10, The line of action of ? is the same as that for ? 11. If two bodies contact one another (e.g. Externally meshing 12. According to the parallel axis theorem l-+md2 13. For the same rigid body in a plane, moment of inertia gears), then the points of contact have the same normal acceleration remains the same for all set of parallel axes normal to the plane 14. If a body consists of a number of simple shapes, the momernt of inertia of the body about any axis can be determined by adding algebraically the moments of inertia of all the composite shapes computed about the axis 15. The sum of all moment of the external forces and couple moments about point A equals the sum of all kinetic moments about AExplanation / Answer
1-F WILL NOT HAVE SAME ACCELERATION
2-T
3-F EQUAL TO CHANGE IN KE+PE
4-F
5-F
6-T
7-T
8-T
9-T
10-F
11-F NORMAL ACCELERATION DEPENDS ON RADIUS OF GEAR
12-F
13-F
14-T
15-T
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