Barrons AP Calculus

(C)

(D)

(E)

(A)

(B)

(C)

(D)

(E)

(A)

(B)

(C)

(D)

(E)

76. (A)
    (B)
    (C)
    (D)
    (E)

the curve   along   which   the particle    moves   must    be  a   straight    line

its velocity    and acceleration    vectors must    be  perpendicular

the curve   along   which   the particle    moves   must    be  a   circle

A   particle    is  moving  on  the curve   of  y   =   2x  −   ln  x   so  that        at  all

times   t.  At  the point   (1,2),      is

4

2

−4

1

−2

In Questions 75–76, a particle is in motion along the polar curve r = 6 cos 2θ
such that radian/sec when .

At  that    point,  find    the rate    of  change  (in units   per second) of  the particle’s

distance    from    the origin.

−6

−2

−

2

6

At  that    point,  what    is  the horizontal  component   of  the particle’s  velocity?

−2

Use the graph of f ′ on [0,5], shown below, for Questions 77 and 78.