A 1-kg rock that weighs 10 N is thrown straight upward at 20 m/s. ...

[crazycityslicker]

A 1-kg rock that weighs 10 N is thrown straight upward at 20 m/s. Neglecting air resistance, the net force that acts on it when it is half way to the top of its path is
 
  A) less than 10 N.
  B) 10 N.
  C) more than 10 N.

Question 2

A rock is thrown vertically into the air. At the top of its path, its acceleration is
 
  A) zero.
  B) 10 m/s2.
  C) between 0 and 10 m/s2.
  D) greater than 10 m/s2.

[tanna.moeller]

Answer to Question 1

Answer: B

Answer to Question 2

Answer: B

[crazycityslicker]

Thank you!

[tanna.moeller]

Always glad to help...