Question

Homework 7. Chapter 8 Show work - except for fill-in-blanks. Velocity and acceleration 7.1 4 Notation, words, pictures for position, velocity, and acceleration. (Sections 3.1 and 8.1) Complete each blank with a word: point reference frame position velocity acceleration Q/P MỹQ is point Q's Na0 is point Q's is point Q's vector from iIn iIn Draw P, Q, and F/P Draw Q and N. 7.2 4 What is a point and a particle? Section 3.1) e center of mass, draw a doughnut Statement A point has all the attributes of a particle. A particle has all the attributes of a point. A point with mass (massive point) is a particle. True/False The center of mass of a rigid body is a point. True/False The center of mass of a rigid body is a particle. True/False True or False True/False True/False 7.3 Concept: What objects have a unique velocity/acceleration? (Section 8.1) The velocity V of some object S relative to Earth is to be determined This object S could be a (circle all objects that have an unambiguously defined velocity V): Real number Vector Matrix 3D orthogonal basis Set of points Center of a circle Mass center of set of particles Mass center of a rigid body System of particles and bodies Line Triangle Reference frame Rigid body Flexible body Repeat for the acceleration ã of some obiect S relative to Earth [box appropriate obiectsl Point Particle

solve 7.1,7.2, and 7.3

Answer 1

7.1)

$\vec{r}^{Q/P}$ is point Q's position vector from point P.

$^{N}\vec{V}^{Q}$ is point Q's velocity in reference frame N

$^{N}\vec{a}^{Q}$ is point Q's acceleration in reference frame N.

7.2) A point has all the attributes of a particle - True

A particle has all the attributes of a point - False

A point with mass is a particle - True

The center of mass of a rigid body is a point - True

The center of mass of a rigid body is a particle - False

7.3) This object could be a particle, rigid body, flexible body, system of particles and bodies

For acceleration also the concept is same.