Physics

A roller-coaster car is moving at 20.0 m/s along a straight horizontal track. What is its speed after climbing a 15.0 m hill? Neglect the effects of friction.

  1. 👍 0
  2. 👎 0
  3. 👁 92
  1. Without friction and air resistance, we equate potential (PE) and kinetic (KE)energies.

    Energies at bottom of hill = energies at top of hill.

    0+(1/2)m*vi²=mgh+(1/2)m*vf^sup2;

    cancel m and substitute
    g=9.8 m/s²
    vi=20 m/s
    h=15 m

    (1/2)(20²)=9.8*15+(1/2)vf²

    Solve for vf.

    1. 👍 0
    2. 👎 0
  2. HELP !! I do not fully understand how to completely solve this problem. Can you please help me further with the equation?? Thank You. !

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A roller-coaster car is moving at 20.0 m/s along a straight horizontal track. What is its speed after climbing a 15.0 m hill?

    asked by Jaime on May 5, 2013
  2. physics

    A roller coaster car is moving at 20.0m/s along a straight horizontal track. what is the speed after climbing a 15.0m hill? neglect the effects of friction

    asked by Chelsey Achord on December 3, 2012
  3. Physics

    Steel Phantom is a roller coaster in Pennsylvania that, like the Desperado in Nevada, has a vertical drop of 68.6m Suppose a roller-coaster car with a mass of 1000 kg travels from the top of that drop without friction. The car

    asked by Anonymous on December 3, 2012
  4. Physics!

    A roller coaster track is designed so that the car travels upside down on a certain portion of the track, as shown in Figure P5.20. What is the minimum speed the roller coaster can have without falling from the track? Assume the

    asked by Kaylee on September 20, 2011
  5. physics

    A roller coaster track is designed so that the car travels upside down on a certain portion of the track as shown in the figure below. What is the minimum speed the roller coaster can have without falling from the track? Assume

    asked by Garcia on October 4, 2012
  6. physics

    The mass of a roller-coaster car, including its passengers, is 481 kg. Its speed at the bottom of the track in the figure below is 20 m/s. The radius of this section of the track is r1 = 24 m. Find the force that a seat in the

    asked by Anonymous on October 6, 2012
  7. physics

    Consider a roller coaster as it travels near the bottom of its track as sketched in the figure below. At this point, the normal force on the roller coaster is three times its weight. If the speed of the roller coaster is 27 m/s,

    asked by sandy on November 1, 2011
  8. Physics

    A roller coaster works by gravitational energy. The coaster car is pulled up to a high point and then released, rolling downwards on the track through all manners of curves and loops. I have a short roller coaster car that I pull

    asked by Shin on May 6, 2013
  9. Science

    Amber visits a theme park that has a roller coaster that travels upside down. Which of the following is the best explanation for why the roller coaster car stays in contact with the track when it travels upside down? A)The track

    asked by Harry please please on April 12, 2012
  10. physics

    A roller coaster is on a flat track heading towards an incline, moving at 4.80 m/s. After it has gone down the 66.0° incline (measured from the horizontal), the roller coaster is now going at a speed of 23.3 m/s. What is the

    asked by masla on September 21, 2016

More Similar Questions