Given Information:
Initial velocity = vi = 60 m/s
Final velocity = vf = 0 m/s
Deceleration = a = -2 m/s²
Required Information:
time = t = ?
distance = s = ?
Answer:
time = t = 30 sec
distance = s = 900 meters
Step-by-step explanation:
We know from the kinematics,
vf = vi + at
at = vf - vi
t = (vf - vi)/a
t = (0 - 60)/-2
t = -60/-2
t = 30 seconds
Now the distance that the car traveled after applying the brakes can be found using the equation,
s = vit + ½at²
s = 60*30 + ½(-2)(30)²
s = 1800 - 900
s = 900 m
Therefore, the correct option is 30 sec and 900 meters