Find alpha
so that the force 3i+alpha j do 0 work acting on a particle moving along line y=2x+3.
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dot product should be zero .
(3i+aj).(j-2i)=3-2a=0
a=1.5
Hope it helps you.
Remind me. it it wrong or right.
(3i+aj).(j-2i)=3-2a=0
a=1.5
Hope it helps you.
Remind me. it it wrong or right.
Sriyathmika:
sorry bro its wrong
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