KinematicsHard
Question
A particle moves in XY plane such that its position, velocity and acceleration are given by 
Which of the following condition is correct if the particle is speeding down
Which of the following condition is correct if the particle is speeding down
Options
A.xvx + yvy < 0
B.xvx + yvy > 0
C.axvx + ayvy < 0
D.axvx + ayvy > 0
Solution
For speeding down 
< 0 ⇒ axvx + ayvy < 0
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