physics

posted by .

A car is traveling at 95km/hr. the driver steps on the brakes and the car comes to a stop in 60m. What is the car's deceleration?

  • physics -

    Vi = 95,000m/3600 s = 26.4 m/s
    v = Vi - a t
    v = 0 at end of trip
    0 = 26.4 - a t so t = 26.4/a

    x = Vi t - .5 a t^2
    60 = 26.4 t - .5 a t^2

    60 = 26.4 (26.4/a) -.5 (a)(26.4^2)/a^2

    60 = .5 (26.4)^2/a

    a = 5.8 m/s^2 is deacceleration

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. calc

    a) A car is traveling at 50 mi/h when the brakes are fully applied, producing a constant deceleration of 40 ft/s^2. What is the distance covered before the car comes to a stop?
  2. 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 …
  3. Physics

    Two cars are traveling along a straight line in the same direction, the lead car at 22 m/s and the other car at 34 m/s. At the moment the cars are 59 m apart, the lead driver applies the brakes, causing the car to have a deceleration …
  4. physics

    Assuming that it takes 0.10 s for the driver to react before applying the brakes, what is the stopping distance (the distance from the point where the driver first sees the need to stop to the point where the car comes to a stop) for …
  5. Physics

    A car is traveling at a constant negative velocity of 12.0 m/s. The driver steps on the brakes. The car slows to a stop. The car travels 10.0 m while it is slowing down. What is the magnitude of its acceleration?
  6. Physics

    A car is traveling at a constant negative velocity of 12.0 m/s. The driver steps on the brakes. The car slows to a stop. The car travels 10.0 m while it is slowing down. What is the magnitude of its acceleration?
  7. PHYSICS

    The driver of a car traveling at 25.0 m/s applies the brakes and undergoes a constant negative acceleration of magnitude 2.50 m/s2. How many revolutions does each tire make before the car comes to a stop, assuming that the car does …
  8. science

    A car is travelling at 20m/s along a road. A child runs out into the road 50m ahead and the car driver steps on the brakes pedal. What must the car’s deceleration if the car is to stop just before it reaches the child?
  9. Physics Part A HELP!!

    4.) In coming to a stop, a car leaves skid marks 80m long on the highway. Assuming a DEceleration of 7.00 m/s^2 (m/s/s), estimate the speed of the car just before breaking. 6.) A car traveling @ 90km/h strikes a tree. The front end …
  10. Physics- Car moving with speed of 22 m/s...

    A car is moving with a speed of 22 m/s. The driver then brakes, and the car comes to a halt after 6.5 s. What is the distance covered by the car after the driver brakes, until it comes to a stop?

More Similar Questions