Question

10. Fór motion of an object along x-axis, the velocity v
depends on the displacement x as v=3x^2-2x
what is the acceleration at x=- 2 m
(a) 48 ms^-2 , (b)80 ms^- 2
(c) 18 ms^-2
(d) 10 ms^- 2



^= power
please answer ​

Answer 1

Answer:b

Explanation:a=dv/dt

Dividing and multipling ds we get

dv/ds×ds/dt=a

a=vdv/dt since ds/dt = velocity where s is displacement

Dv/dt =d(3x²-2v)/dt

=6x-2

At x=2

dv/ds=10

V=3×2²-2×2

=8

Therefore a = 8×10= 80