contestada

A car traveling at 30 m/s is brought to rest at a constant rate in 20 s by applying the brake. a) What is its acceleration? b) How far did it travel after the brake was applied?

Respuesta :

pfellas
acceleration = -30/20 = -1.5 m.s^2
V^2 = U ^2 + 2 a s
0 = 900 - 2 x 1.5 x s
3 s = 900
s = 300 m

Otras preguntas