Post a New Question

Physics - please, I really need help

posted by .

a car attempts to stop and slides 25.5m while accelerating at -4m/s^2. The car's initial velocity was 20m/s. Find the time the slide took. Note that the final velocity is not known and that you need a quadratic solution.

I know the quadratic formula, but I'm not sure how to plud in the values; could sombody please calrify. Thank you in advance. :)

  • Physics - please, I really need help -

    Vf^2=Vi^2 +2a* disance
    find Vfinal first. You have Vi, a, distance. Remember a is negative.

    Now, knowing Vf.
    Vf=Vi+ a*time
    Now find time.
    YOu do not need the quadratic formula.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics - Important

    a car attempts to stop and slides 25.5m while accelerating at -4m/s^2. The car's initial velocity was 20m/s. Find the time the slide took. Note that the final velocity is not known and that you need a quadratic solution. I know the …
  2. physics

    A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due to the force of friction. A. What was the acceleration of the car. B. What was the car’s initial momentum?
  3. Physics

    Givent the initial velocity of the car, the driver's reaction time, and the coefficient of friction,find the total distance required far a car to stop. <------ What is the formula that I need to solve this?
  4. physics ( please help me)

    a railroad handcar is moving along striaght, fricionless tracks. In each of the following cases the car initially has a total mass (car and contents of magniude 4.00 m/s^1. Find the final velocity of the car in each of the three cases. …
  5. Physics

    A car is moving in the +x direction with the following position equation of motion: x = 5.41(m/s)t - 2.7(m/s^2)t^2. (a) What is the initial velocity of the car?
  6. PHYSICS

    A car is moving in the +x direction with the following position equation of motion: x = 5.41(m/s)t - 2.7(m/s^2)t^2. (a) What is the initial velocity of the car?
  7. physics

    A car travels a distance of 100m per second with a constant acceleration and average velocity of 20m per second .The final velocity acquired by the car is 25m per second .Find The initial velocity and acceleration of car
  8. physics

    A car travels a distance of 100m per second with a constant acceleration and average velocity of 20m per second .The final velocity acquired by the car is 25m per second .Find The initial velocity and acceleration of car
  9. physics

    A car travels a distance of 100m per second with a constant acceleration and average velocity of 20m per second .The final velocity acquired by the car is 25m per second .Find The initial velocity and acceleration of car
  10. Physics >.<

    A big truck has a mass of 5,000kg. It is moving down the road at a velocity of 15m/s. As it approaches a stop sign, the driver tries to stop, but the truck slides on ice and hits a car (mass = 500kg) that is stopped. After the collision, …

More Similar Questions

Post a New Question