Recent content by jelder

  1. J

    Rocket's Max Altitude & Flight Time

    A 200kg weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 31.0 {\rm m/s^2} for 35.0 s, then runs out of fuel. Ignore any air resistance effects. I just don't know how to integrate the weight into the problem known variables (hopefully they are...
  2. J

    What acceleration will bring you to rest right at the intersection?

    thank you so much that helped a ton!
  3. J

    What acceleration will bring you to rest right at the intersection?

    You are driving to the grocery store at 20 m/s. You are 110m from an intersection when the traffic light turns red. Assume that your reaction time is 0.50s and that your car brakes with constant acceleration. How far are you from the intersection when you begin to apply the brakes? What...