Question

A particle moves along a straight line OX. At a time t (in seconds) the distance x (in metres) of the particle from O is given by X=40+12t−t3. How long would the particle travel before coming to rest: -

Answer 1

Answer:

Dimostrare che l'indice di rifrazione del vetro rispetto all'aria è

il reciproco dell'indice di rifrazione dell'aria rispetto a

vetrogfg

Explanation:

Answer 2

Answer:

Answer Is 56m

Explanation:

x=(-t³+12t+40)

d/dt(-t³+12t+40)

d/dt (-t³) + d/dt (12t) + d/dt (40)

x= -3t² + 12

3t²=12

t²=12/3

t²=4

t=2

=(-t³+12t+40)......Place t=2

= -(2)³+ 12×2 +40

= -8+24+40

= 64-8

= 56