physics
posted by Anonymous .
A driver of a car traveling at 17.4 m/s applies
the brakes, causing a uniform deceleration of
1.8 m/s2
.
How long does it take the car to accelerate
to a final speed of 13.4 m/s?
Answer in units of s.

physics 
bobpursley
vf=vi+a*time
you are given a as 1.8m/s^2, vf=0, vi=17.4m/s solve for time t. 
physics 
Arora
u = 17.4m/s, a = 1.8m/s^2
v = 13.4m/s
Using the first equation of motion:
=> v = u + at
=> (vu)/a = t
=> 4/1.8 = t
=> 2.22 seconds 
physics 
bobpursley
Arora: When you give it away free, it has no value.

physics 
Shenaya
Hope you've heard about equations of motion.
For this one we can use v=u+at , where v=final velocity(in m/s) , u=initial velocity(in m/s) , a=uniform acceleration(in m/S^2) and t=time(in seconds).
Now substitute values for the above equation to find the required time.
Respond to this Question
Similar Questions

physics
Velocity and displacement with uniform acceleration: 1. A car with an initial speed of 23.7 km/h accelerates at a uniform rate of 0.92 m/s^2 for 3.6 s. Find the final speed and the displacement of the car during this time. The final … 
physics
A driver of a car traveling at 14.2 m/s applies the brakes, causing a uniform deceleration of 2.0 m/s 2 . How long does it take the car to accelerate to a ﬁnal speed of 10.7 m/s? 
physics
A driver of a car traveling at 15.9 m/s applies the brakes, causing a uniform deceleration of 1.7 m/s2. How long does it take the car to accelerate to a final speed of 13.0 m/s? 
Math
A driver of a car traveling at 17.1 m/s applies the brakes, causing a uniform deceleration of 1.5 m/s2. How long does it take the car to accelerate to a final speed of 13.3 m/s? 
physics
a driver of a car traveling at 15.6 m/s applies the brakes causing a uniform deceleration of 2.1 m/s squared. how long does it take the car to accelerate to a final speeed of 10.9 m/s. answer in units of seconds 
science
A driver of a car traveling at 17.4 m/s applies the brakes, causing a uniform deceleration of 1.8 m/s2. How long does it take the car to accelerate to a final speed of 13.4 m/s? 
physics
Two cars are traveling along a straight line in the same direction, the lead car at 26 m/s and the other car at 40 m/s. At the moment the cars are 49 m apart, the lead driver applies the brakes, causing the car to have a deceleration … 
Physics
A driver of a car traveling at 16.6 m/s applies the brakes, causing a uniform deceleration of 3.0 m/s^2. How long does it take the car to accelerate to a ﬁnal speed of 12.1 m/s? 
physics
A driver of a car traveling at 14.5 m/s applies the brakes, causing a uniform deceleration of 1.7 m/s 2 . How long does it take the car to accelerate to a ﬁnal speed of 9.50 m/s? 
Physics
a driver of a car traveling at 17.3 m/s applies the brakes causing a uniform deceleration of 2.8m/s^2. How long does it take the car to accelerate to a final speed of 13.5 m/s?