When a ball is thrown straight up with no air resistance, the ...

[APUS57]

When a ball is thrown straight up with no air resistance, the acceleration at its highest point
 
  A) is upward.
  B) is downward.
  C) is zero.
  D) reverses from upward to downward.
  E) reverses from downward to upward.

Question 2

Astronaut Hans leaves Earth in a spaceship traveling at a speed of 0.280c relative to the observer Brian at rest on Earth.
 
  Hans is holding a pencil at an angle of 30 with the direction of travel, as seen by Hans. What angle does the pencil make with the direction of travel, as seen by Brian on Earth?
  A) 29
  B) 30
  C) 31
  D) 33
  E) 90

[yuyiding]

Answer to Question 1

B

Answer to Question 2

C

[APUS57]

Gracias!

[hollysheppard095]

TYSM