A 2.0 kg mass is moving along the x-axis. The potential energy ...

[c0205847]

A 2.0 kg mass is moving along the x-axis. The potential energy curve as a function of position is shown in the figure. The kinetic energy of the object at the origin is 12 J. The system is conservative, and there is no friction.
 
  (a) What will be the kinetic energy at 2.0 m along the +x-axis?
  (b) What will be the speed of the object at 6.0 m along the +x-axis?
  What will be an ideal response?

Question 2

A roller coaster of mass 80.0 kg is moving with a speed of 20.0 m/s at position A as shown in the figure. The vertical height above ground level at position A is 200 m. Neglect friction.
 
  (a) What is the total mechanical energy of the roller coaster at point A?
  (b) What is the total mechanical energy of the roller coaster at point B?
  (c) What is the speed of the roller coaster at point B?
  (d) What is the speed of the roller coaster at point C?
 
  What will be an ideal response?

[jaygar71]

Answer to Question 1

Answer: (a) 24 J (b) 2.2 m/s

Answer to Question 2

Answer: (a) 1.73  105 J (b) 1.73  105 J (c) 65.7 m/s (d) 34.4 m/s

[c0205847]

Excellent

[Jsherida]

Gracias!