Figure 2.1

Iclicker Question #1

What is the average velocity as the car moves from point C to E?

A) 4 m/sB) 80 mC) -80 mD) -4 m/sE) It depends on the make and model of car.

Instantaneous and Average Velocity

Iclicker Question #2

Given that x(t)=-5t3+20t , what is v(t=1) and a(t=1)?

A) v=20 m/s and a=0 m/s2

B) v=20 m/s and a=-5 m/s2

C) v=15 m/s and a=-25 m/s2

D) v=5 m/s and a=-30 m/s2

E) None of the above

Relation between x versus t graphs and particle motion

Q2.1

A. point P. B. point Q. C. point R. D. point S.

E. not enough information in the graph to decide

This is the x-t graph of the motion of a particle. Of the four points P, Q, R, and S, the velocity vx is greatest (most positive) at

This is the x-t graph of the motion of a particle. Of the four points P, Q, R, and S, the velocity vx is greatest (most positive) at

A. point P. B. point Q. C. point R. D. point S.

E. not enough information in the graph to decide

A2.1

Q2.3This is the x-t graph of the motion of a particle. Of the four points P, Q, R, and S, the acceleration ax is greatest (most positive) at

A. point P. B. point Q. C. point R. D. point S.

E. not enough information in the graph to decide

This is the x-t graph of the motion of a particle. Of the four points P, Q, R, and S, the acceleration ax is greatest (most positive) at

A2.3

A. point P. B. point Q. C. point R. D. point S.

E. not enough information in the graph to decide

Relationship of x(t), v(t) for constant acceleration

1-D constant acceleration formulas

Total distance travelled is area under curve

Total change in velocity is area under curve