An object of mass 2.00 kg is held at a position A, a vertical ...

[meagbuch]

An object of mass 2.00 kg is held at a position A, a vertical height of 20.0 m above the ground. Point B is 8.00 m directly below A. Neglect air resistance and use g = 10.0 m/s2.
 
  (a) What is the speed of the object at position B when it falls from position A? (b) What is the speed of the object just before it touches the ground? (c) What is the ratio of the total energy of the object at position A to position B?

Question 2

(a) A force of 15 N applied to a spring compresses it by 4 cm. What is the potential energy of the spring in the compressed position?
 
  (b) A force of 15 N applied to a spring stretches it by 4 cm. What is the potential energy of the spring in the stretched position?

[mammy1697]

Answer to Question 1

(a) 12.6 m/s
(b) 20.0 m/s
(c) 1:1

Answer to Question 2

(a) 0.3 J
(b) 0.3 J

[meagbuch]

Excellent

[juliaf]

Gracias!