An object of mass 4.0 kg is thrown vertically upwards from ground ...

[frankwu]

An object of mass 4.0 kg is thrown vertically upwards from ground level with an initial speed of 20 m/s. Ignore friction and use g = 10 m/s2. How high did the object go?
 
  A) 20 m
  B) 4.5 m
  C) 15 m
  D) 80 m
  E) None of the other choices is correct.

Question 2

An object is moving with constant non-zero acceleration in the +x-axis. The position versus time graph of this object is
 
  A) a horizontal straight line.
  B) a vertical straight line.
  C) a straight line making an angle with the time axis.
  D) a parabolic curve.
  E) a hyperbolic curve.

[Expo]

Answer to Question 1

A

Answer to Question 2

D