Ask questions and get helpful responses.
Ask a New Question
  1. Questions

physics

You are arguing over a cell phone while trailing an unmarked police car by 25.0 m; both your car and the police car are traveling at 120 km/h. Your argument diverts your attention from the police car for 2.0 s (long enough for you to look at the phone and yell,“I won't do that!”). At the beginning of that 2.0 s, the police officer begins braking suddenly at 6.00 m/s2. (a) What is the separation between the two cars when your attention finally returns? Suppose that you take another 0.400 s to realize your danger and begin braking. (b) If you too brake at 6.00 m/s2, what is your speed (in km/h) when you hit the police car?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
katie

  1. Vo = 120km/h = 120000m/3600s=33.33 m/s.

    d1 = Vo*t + 0.5a*t^2
    d1 = 33.33*2 + (-3)*2^2 = 54.66 m Traveled by policeman in 2 s.

    d2 = Vo * t = 33.33 * 2 = 66.66 m/s. =
    Distance traveled by me in 2 s.

    d3 = Do - (d2-d1)
    d3=25 - (66.66-54.66)=13 m = Separation
    between me and the policeman.

    b. d1 = Vo * t = 33.33 * 0.40 = 13.33 m
    Oops! I hit the cop.

    Speed = 120 km/h Because I hit the car before I started breaking.

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
    Henry

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    An unmarked police car traveling a constant 90 km/h is passed by a speeder traveling 128 km/h. Precisely 1.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.80 m/s2 ,

  2. Physics

    An unmarked police car traveling a constant 85.0 km/h is passed by a speeder traveling 130 km/h . Precisely 3.00 s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30

  3. Calculus 1

    A police car is located 60ft to the side of a straight road. A red car is driving in the direction of the police car and is 90 ft up the road from the location of the police car. The police radar read that the distance between the

  4. physics

    A speeding motorist travels with a constant speed of 15 m/s on a straight road. At time t = 0, he passes a hidden police car which is at rest. The instant that the motorist passes, the police car begins accelerating at a constant

  1. Math

    150 men live in a certain town: 85 are married 70 have a cell phone 75 own a car 55 are married and have a cell phone 35 have a cellphone and a car 40 are married and have car 30 are married, have a car and have a cellphone. How

  2. college physics 44

    An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how

  3. science

    Which of the follow comparisons would be an inaccurate analogy between prokaryotic cells and eukaryotic cells? A - A eukaryotic cell is like a college campus was a prokaryotic cell is like a one-room schoolhouse B - A eukaryotic

  4. Math

    Which of the following is the best alternative plan to purchasing cell phone insurance? Group of answer choices Buy 2 of the same phone so that you have a backup phone in case the original breaks or needs replacement. Trust that

  1. physics

    A speeder passes a parked police car at a constant speed of 25.8 m/s. At that instant, the police car starts from rest with a uniform acceleration of 2.68 m/s^2. How much time passes before the speeder is overtaken by the police

  2. Math

    A speeder passes a parked police car at 30 m/s and continues on, obliviously maintaining a constant velocity. At that instant, the police car starts from rest with a uniform acceleration of 2.44 m/s2. a) How much time passes

  3. physics - college

    An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how

  4. Physics 12

    A sports car is travelling along a highway at a constant velocity of 36 m/s [N] exceeding the speed limit. It passes an unmarked police car parked on the shoulder of the highway. The police car accelerates from rest, 3.0 s after

Still need help? You can ask a new question.