Tyra J

Most popular questions and responses by Tyra J
  1. science

    A 250.0 kg roller coaster car has 20,000 J of potential energy at the top of the hill. Neglecting frictional losses, what is the velocity of the car at the bottom of thee hill? A.) 9.8 m/s B). 12.6 m/s C). 14.1 m/s D). 8.9 m/s

    asked on October 9, 2007
  2. Physical Science

    If you roll a 5.0 kg bowling ball down the alley at 10.0 m/s, how much work did you do on the ball? a). 250 J b). 490 J c). 2500 J

    asked on October 10, 2007
  3. Physical Science

    A flower pot falls off a window ledge 10.0 m above the ground. Its velocity as it hits the ground is?

    asked on October 10, 2007
  4. science

    If you do 60-0 J of work hoistig a 2kg bale of hay, to what height did you lift it?

    asked on October 9, 2007