The formula mg = kx describes a spring that is stretched by ...

[rosent76]

The formula mg = kx describes a spring that is stretched by hanging an object on it. The constant k is called the spring constant. What are its units?
 
  A) m s2/kg
  B) kg/s2
  C) kg s2
  D) s/m kg
  E) N m

Question 2

Daisy throws a rock horizontally with a speed of 12.0 m/s from a bridge. It falls 2.28 s before reaching the water below.
 
  (a) When the rock hits the water it is traveling with what horizontal component of velocity?
  (b) What was the total speed just before hitting the water?

[efwsefaw]

Answer to Question 1

B

Answer to Question 2

(a) 12.0 m/s
(b) 25.4 m/s