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a driver of a car traveling at 15.0 m/s applies the brake, causing a uniform acceleration of -2.0 m/s^2. how long does it take for the car the reach a final speed of 10 m/s



Answer :

MathPhys

Answer:

2.5 s

Explanation:

The car moves at uniform or constant acceleration. We can use kinematic equations, also known as SUVAT equations, to model the car's motion. In this case, the equation we will use is:

v = u + at

where

  • v is the final velocity
  • u is the initial velocity
  • a is the acceleration
  • t is time

Plug in values and solve:

10 m/s = 15.0 m/s + (-2.0 m/s²) t

t = 2.5 s

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