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1. As a projectile moves up. a. Its velocity and acceleration decrease b. Its velocity and acceleration remain constant c. Its velocity increases while its acceleration decreases d. Its velocity decreases while its acceleration remains constant
2. Which of the following pairs of projection for a given initial velocity covers the same range? a. 0 and 90° b. 30⁰ and 150° c. 40⁰ and 50⁰ d. 45° and 90⁰
3. A package is dropped from a plane flying horizontally at a certain velocity v. Which of the following is true? a. the acceleration of the package is zero. b. The initial velocity of the package is directly beneath the plane at all times. c. The package is directly beneath the pane at all times. d. The speed by which the package will hit the ground is equal to v.
For items 4-6, refer to this situation. Three identical balls are released from the same height with equal initial speeds. Ball A is thrown vertically down, Ball B is thrown horizontally, and Ball C is thrown down at an angle (neither 0° nor 90°) with the horizontal. Another identical Ball D is dropped from rest also from the same height.
4. Which among the four balls will reach the ground first? a. Ball A b. Ball B c. Ball C d. Ball D
5. Which two balls will reach the ground at the same time? a. Balls A and B b. Balls A and D c. Balls B and D d. Balls C and A
6. Which among the four balls has the greatest vertical momentum upon striking the ground? a. Ball A b. Ball B C. Ball C d. Ball D
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