Chapter_4

# Chapter_4 - Chapter 4: Reading assignment: Chapter 4.1,...

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In this chapter we will learn about kinematics (displacement, velocity, acceleration) of a particle in two dimensions (plane). All four kinematic equations are still true, only in vector form Superposition principle  treat vector components independently Projectile motion Chapter 4: Reading assignment: Chapter 4.1, 4.2, 4.3 4.4 and 4.5 will be combined with chapter 6, skip 4.6 Homework: QQ3, AE1, AE4, 3, 5, 7, 9, 16, 21, 62 Due dates: Tu/Th section : Thursday, Feb. 3 MWF section : Monday, Feb. 7 Remember: Homework 3 is due Monday, Jan. 31 (section B); Wednesday, Feb. 2 (section A).

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You throw two rocks straight up in the air. One reaches a height of 10m, the other a height of 20 m. Which one will be in the air longer? (Ignore air resistance). A. 10 m. B. 20m. C. The same time. D. Need more information. E. Depends on weight.
Displacement in a plane The displacement vector r : i f r r r - Displacement is the straight line between the final and initial position of the particle. That is the vector difference between the final and initial position.

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Average Velocity Average velocity v : t r v Average velocity : Displacement of a particle, r , divided by time interval t.
Instantaneous Velocity Instantaneous velocity v : dt r d t r v t = 0 lim Instantaneous velocity v : Limit of the average velocity as t approaches zero. The instantaneous velocity equals the derivative of the position vector with respect to

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## Chapter_4 - Chapter 4: Reading assignment: Chapter 4.1,...

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