A projectile MUST____. List all that apply in alphabateical....?

Question

A. Be moving downward
B. Have a horizontal motion in additon to a verticle motion
C. Experience either an applied force or air resistance
D. Be changing its velocity
E. Have a constant speed
F. Be accelerating

Answer 1

its either B or D

Answer 2

B.
C.
D.
E.

it's not A because projectiles can move upward (think of throwing a ball upwards - that's projectile motion in the upward direction, before the ball starts falling downwards)


F i'm not really sure about. if you throw a ball directly upward, I know acceleration is constant throughout that upward projectile, but if you throw a ball outward, i think it declerates because the force of gravity and air friction both cause the ball to decrease speed in the horizontal direction and vertical direction. so if the ball lands on the ground and its speed comes to zero, obviously the acceleration will have to decrease to zero too in order for the ball to stop. so a projectile motion can be decelerating (not accelerating).

Answer 3

C&D - a. can't be true because you can shoot a projectile up, b isn't necacarily true because you can shoot it straight up, e could only be correct if u start it out at its maximum velocity and theres no air resistance, and f it cant be because the projectile is facing a constant acceleration of 9.8 due to gravity so its acceleration wont be changing, it would be constant.