A ball rolls over the edge of a table with a horizontal velocity ...

[james9437]

A ball rolls over the edge of a table with a horizontal velocity v m/s. The height of the table is 1.6 m and the horizontal range of the ball from the base of the table is 20 m.
 
  What is the horizontal velocity of the ball just before it touches the ground? A) 35 m/s
  B) 9.8 m/s
  C) 20 m/s
  D) 4.9 m/s
  E) 70 m/s

Question 2

A 4.0-C charge is situated at the origin of an xy-coordinate system. What is the potential difference between a point x = 4.0 m and y = -4.0 m because of this charge?
 
  A) 18  103 V
  B) -18  103 V
  C) 0 V
  D) 36  103 V
  E) -36  103 V

[jesse.fleming]

Answer to Question 1

A

Answer to Question 2

C

[james9437]

Wow, this really help

[marict]

Thanks for the timely response, appreciate it