Multiple Choice
A particle is moving to the right with constant speed 2 along the curve y = cos x in the xy-plane. Find its velocity at the instant when it crosses the vertical line x = .
A) v = i - j
B) v = i -
j
C) v = i -
j
D) v = i -
j
E) v = i +
j
Correct Answer:

Verified
Correct Answer:
Verified
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