Post a New Question

Physics

posted by .

A car starts from rest and travels for 5.0s with a uniform acceleration of +1.5 m/s^2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s^2. If the brakes are applied for 3.0 s, how fast is the car going at the end of the braking period, and how far has it gone from its start?

  • Physics -

    1) find the velocity at the time brakes were applied: Vf=at=7.5m/s

    2) then find the final velocity at end of brakeing: Vf=7.5-2*t
    1.5 m/s

  • Physics -

    20m

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A car starts from rest and travels for 7.8 s with a uniform acceleration of 3.2 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.1 m/s2. If the brakes are applied for 2.8 s, how fast is the car going …
  2. Physics

    A car starts from rest and travels for 6.0 s with a uniform acceleration of +1.5 m/s2. The driver then applies the brakes, causing a uniform acceleration of -2.0 m/s2. If the brakes are applied for 3.0 s, how fast is the car going …
  3. physics

    A car starts from rest and travels for 6.0 s with a uniform acceleration of +2.4 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.0 m/s2. If the brakes are applied for 3.0 s, determine each of the …
  4. physics

    A car starts from rest and travels for 6.3 s with a uniform acceleration of 2.3 m/s2. The driver then applies the brakes, causing a uniform acceleration of −1.9 m/s2. If the brakes are applied for 2.6 s, how fast is the car going …
  5. Physics

    A car starts from rest and travels for 6.2 s with a uniform acceleration of +2.4 m/s2. The driver then applies the brakes, causing a uniform deceleration of 1.2 m/s2. If the brakes are applied for 2.5 s, how fast is the car going at …
  6. physics

    A car starts from rest and travels for 7.0 s with a uniform acceleration of +2.3 m/s2. The driver then applies the brakes, causing a uniform negative acceleration of -1.0 m/s2. If the brakes are applied for 2.0 s, how fast is the car …
  7. physics

    A car starts from rest and travels for 6.0s with a uniform acceleration of 2.7m/s ^2. The driver then applies the brakes, causing a uniform acceleration of -2.0m/s^2. If the brakes are applied for 2.0s, determine each of the following. …
  8. physics lon capa

    A car starts from rest and travels for 4.93 s with a uniform acceleration of +1.53 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.99 m/s2. If the brakes are applied for 2.83 s, how fast is the car going …
  9. physics lon capa

    A car starts from rest and travels for 4.93 s with a uniform acceleration of +1.53 m/s2. The driver then applies the brakes, causing a uniform acceleration of -1.99 m/s2. If the brakes are applied for 2.83 s, how fast is the car going …
  10. physics

    A car starts from rest and travels for 5.0 s with a uniform acceleration of +2.5 m/s2. The driver then applies the brakes, causing a uniform negative acceleration of -3.0 m/s2. If the brakes are applied for 2.0 s, how fast is the car …

More Similar Questions

Post a New Question