Question

At any instant of time acceleration and velocity of
perpendicular to each other is equal to :-
(1) 1 sec.
(2) 2 sec.
(3) 1.5 sec. (4) 5
sec.
68.
61.
a particle are given by ā=i+j & y = 6i+ej
then rate of change of speed at the same instant
will be:-
ticle is
69
icle at
6î+8)
(1)
(3 +43)
25
(2)
25
7
(3)
(3î +8h)
​

Answer 1

Answer:

1.5 sec

And I can't understand the second question please tell it correctly

Anyway hope you get the first answer ☺️