Example 2 posteriore a particle is given a
position vector A
Cits unit vector
resultant direction (B)
- Sony
Answers
Answered by
0
Answer:
Explanation:r
=(t
2
−4t+6)
i
^
+(t
2
)
j
^
velocity =
dt
dr
=(2t−4)
i
^
+(2t)
j
^
acceleration =
dt
dv
=(2)
i
^
+(2)
j
^
a
.
v
=((2t−4)
i
^
+(2t)
j
^
).((2)
i
^
+(2)
j
^
)
when they are perpendicular then a.v = 0
((2t−4)
i
^
+(2t)
j
^
).((2)
i
^
+(2)
j
^
)=0
(2t−4)×2+4t=0
4t−8+4t=0
t=1s
Answered by
20
Explanation:
t=1 sec
.hope it helps you
Similar questions