An athlete throws a ball with a velocity of 40 m/s at an angle of ...

[NguyenJ]

An athlete throws a ball with a velocity of 40 m/s at an angle of 20 above the horizontal. Which of the following statements is true in this case?
 
  A) The vertical component of the velocity remains constant.
  B) The horizontal component of the velocity changes.
  C) The vertical component of the velocity changes sign after the ball attains its maximum height.
  D) The horizontal component of the velocity changes sign after the ball attains its maximum height.
  E) None of the given choices is correct.

Question 2

Which of the following will increase the capacitance of a parallel plate capacitor?
 
  A) a decrease in the plate area and an increase in the plate separation
  B) a decrease in the potential difference between the plates
  C) an increase in the potential difference between the plates
  D) an increase in the plate area and a decrease in the plate separation
  E) none of the above

[gabrielle_lawrence]

Answer to Question 1

C

Answer to Question 2

D

[NguyenJ]

Excellent

[Liddy]

Gracias!