A car traveling 95 km/h strikes a tree. The front end of the car compresses and the driver comes to rest after traveling 0.80 m . What was the magnitude of the average acceleration of the driver during the collision?
Express the answer in terms of "g's," where 1.00g=9.80m/s2.

  1. 👍
  2. 👎
  3. 👁
  1. Vi = 95,000m/3600s. = 26.4 m/s.

    V = Vi + 2a*d = 0.
    26.4 + 2a*0.8 = 0,
    a = -16.5 m/s^2.

    g's = -16.5m/s^2/(9.80m/s^2) = -1.68.

    1. 👍
    2. 👎
  2. Correction:
    V^2 = Vi^2 + 2a*d = 0.
    (26.4)^2 + 2a*0.8 = 0,
    a = 435.6 m/s^2.

    g's = 435.6m/s^2/(9.8m/s^2) = 44.4.

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science

    #1. Kilometers per hour describes the speed of an object. ture false **** #2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? a) an airplane flying across the sky b)

  2. physics

    several students are riding in bumper cars at an amusement park. the combined mass of a car A and its occupants is 250 kg. the combined mass of car B and its occupants is 200 kg. Car A is 15 m away from car B and moving to the

  3. physics

    7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car?

  4. Science

    2. Which of the following reference points would allow you to observe the speed of a car that you are traveling in? A. An airplane flying acroos the sky. B. A car traveling next to you at the same speed you are traveling. C. A car

  1. 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

  2. Physics

    The front 1.20 m of a 1550 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 26.0 m/s stops uniformly in 1.20 m, how long does the collision last? cannot_evaluate s


    A stationary police car emits a sound of frequency 1200 Hz that bounces off of a car on the highway and returns to the police car with a frequency of 1250 Hz. The police car is right next to the highway, so the moving car is

  4. Physics

    The parachute on a race car of weight 8,810 N opens at the end of a quarter-mile run when the car is traveling at 34 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1,100 m?

  1. Math

    2. Suppose the angle of depression from a race car driver's eyes to the bottom of the 3-foot high back end of the car in front of him is 18 degrees. How far apart, to the nearest foot, are their bumpers? Assume the horizontal

  2. Physics

    A mechanic jacks up the front of a car to an angle of 6.2° with the horizontal in order to change the front tires. The car is 2.91 m long and has a mass of 1100 kg. Gravitational force acts at the center of mass, which is located

  3. Physics Urgent!

    1.You are driving at the speed of 28.7 m/s (64.2138 mph) when suddenly the car in front of you (previously traveling at the same speed) brakes. Considering an average human reaction, you press the brakes 0.427 s later. Assume that

  4. science

    If you were riding on a train, which of the following would look as if it is not moving? the conductor walking by you a building you are passing a flying bird

You can view more similar questions or ask a new question.