At t = 0.0 s, a runner is moving forward (in the positive direction along the x-axis) at a
speed of 7.0 m/s. for 2.0 s the runner accelerates to his left at 0.50 m/s2
and backward
at 1.0 m/s2
. what is the runner’s position at t = 2.0 s in terms of the component
directions (forward/back and left/right)?

Way forward S_1 = 7\cdot2 - \frac{1\cdot2^{2}}{2} = 12 (m),S

1

=7⋅2−

2

1⋅2

2

=12(m),

path left S_2 = \frac{0.5\cdot2^{2}}{2} = 1 (m)S

2

=

2

0.5⋅2

2

=1(m) ,

therefore, the position of the runner is "forward and left."

d) physical means can be used to separate the components of air.

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.