For projectiles thrown at an angle upward between vertical and horizontal, and considering air resistance to be negligible, which of the following is true:
a. The horizontal component of the velocity is the same throughout its flight.
b. The acceleration decreases as the projectile moves upward.
c. The speed is minimum at the highest point in its trajectory.
d. The acceleration is zero at the highest point in its trajectory.
e. The velocity is zero when the projectile is at its maximum height.
1. a and e
2.b and c
3. c and d
4. a and c
5. all of the above
6. none of the above
Write the number of the best choice here: