If a car could accelerate at 50m/s^2, how long would it take to reach a speed of 100km/h from rest?

Question

if a car could accelerate at 50m/s^2, how long would it take to reach a speed of 100km/h from rest?

Answer 1

100 km/hr

100 km/hr * 1000 m/km * 1 hr/3600 s = 27.78 m / s

v = at

t = v/a

t = 27.78 m/s * 1/50m/s^2

t = 0.555 s

Answer 2

vf = vi + a* t

t = (vf - vi ) / a

t = (100 - 0 ) / 50 = 2 seconds

and

vf² = vi² + 2*a*x

x = (vf²- vi²)/(2 *a)

x = (100²- 0²)/(2 *50) = 100 m

distance traveled = 100 m

Answer 3

V=Vo+ at

Vo=0->V=at<=> t=V/a=100000/50=2000(s)