Peter runs in a constant direction on a straight road. The velocity vs. time graph of Peter's motion shows a straight line with a negative
slope. What does the line tell you about Peter's speed?
a. It is increasing.
c. It is decreasing, then increasir
b. It is decreasing.
d. It is constant.

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. in a typical strike, the chameleon's tongue accelerates at a remarkable 220 m/s2 for 20 ms, then travels at constant speed for another 30 ms.