Recent content by CabalGroupie

  1. C

    What is the speed of a mass on a spring at a displacement of 0.2 m?

    Homework Statement A 2.0 kg mass on a spring is extended 0.3 m from equilibrium position and released. The spring constant is 65 N/m. C.Find the speed of the mass when the displacement is 0.2 m Homework Equations Ek=(0.5)(m) (v^2) Ep=(0.5)(k) (x^2) Ek+Ep=E The Attempt at a...
  2. C

    A car with a mass of 1800 kg slows from 42 km/h [E] to 28 km/h [E].

    Gahh thank you! I feel so incredibly stupid right now that question bothered me way more then it should have
  3. C

    A car with a mass of 1800 kg slows from 42 km/h [E] to 28 km/h [E].

    Homework Statement A car with a mass of 1800 kg slows from 42 km/h [E] to 28 km/h [E]. The impulse from the brakes is? I know its a simple question but I was hoping if I could get a walkthrough. I keep getting the answer 2.5 x 10^4 N*s [W] and the answer is 7.0 x 10^3 N*s Homework...