Question

A)10m.
B)16m.
C)17m.
D)18m.
E)20m.

Answer 1

Resposta:

V$_{0}$ = 162km/h = 45m/s

V = 144km/h = 40m/s

t = 0,4s

.

V = V$_{0}$  + a*t

40 = 45 + a*0,4

40 - 45 = 0,4a

-5 = 0,4a

a = -5/0,4

a = -12,5m/s

.

V² =  V$_{0}$  + 2*a*S

40² = 45² + 2*-12,5*S

1600 = 2025 - 25S

1600 - 2025 = -25S

-425 = -25S

S = 425/25

S = 17m

ALTERNATIVA C