Which of the following statements are true about an object in two-dimensional projectile motion with no air resistance? (There could be more than one correct choice.)
A) The speed of the object is constant but its velocity is not constant.
B) The acceleration of the object is +g when the object is rising and -g when it is falling.
C) The acceleration of the object is zero at its highest point.
D) The speed of the object is zero at its highest point.
E) The horizontal acceleration is always zero and the vertical acceleration is always a non-zero constant downward.
Question 2
The area under a curve in a velocity versus time graph gives
A) acceleration.
B) velocity.
C) displacement.
D) position.
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