11. Which of the objects can be used as a projectile?
A, apple
B. ball
C. can
D. all of the above
12. How can a projectile travel longer or shorter distances in the same period of time?
A. by changing the initial velocity and force used to launch the projectile
B.only the initial velocity need to be changed
C. initial velocity and force used to launch the projectile must not be changed
D. none of the above
13. Which of the examples the object does not move horizontally?
A. a billiard ball rolling on the table
B. a boat travelling in a river
C. falling leaves
D. shell fired from a gun
For items 14-16. A bullet fired from a gun with a horizontal speed of 370m/s in 2s has travelled a distance of 740m.
(Refer to wk1LAS2)
14. Which of the following is 740m?
A. final horizontal velocity
B. horizontal velocity
C. initial horizontal velocity
D. range
15. Which of the properties is 2s?
A. horizontal velocity
B. initial horizontal velocity
C. range
D. time
16. Which of the symbols of the properties of projectile the 370m/s belongs?
A. Vix
B. Vfx
C. Vx
D. X
17. Which of the following motions the object will have if it is thrown completely upward?
A. horizontal motion only
C. vertical motion only
B. both horizontal and vertical motions
D. none of the above
18. Which of the following is the indication of the negative sign in acceleration due to gravity, -9.8m/s??
A. direction
B. external force
C. rapid derease in the speed D. value is getting amalar
For items 19-20. A boy is playing with a ball on top of a building but the ball fell and hits the ground 26m/s after 2.6s.
19. What does Vy=-26m/s mean? (Refer to wk1 LAS 3)
A. decrease in the speed
B. the final answer C. downward speed of a ball D. cannot be defined
20. Which of the following does Y=-(33.124m) represent?
A. distance travelled by the ball B. height of a building C. horizontal displacement
D. size of the building​