chapter 9

Question 1

conclusions about projectile motion

3 of them

Answer 1

• always parabolic
• time to max height = time to fall from max height
• if starting height = landing height initial and final velocities are equal

Question 2

factors affecting projectile motion

3 of them

Answer 2

• time of flight
• diagonal projection
• horizontal displacement

Question 3

if your angle of projection is < 45 or > 45 what will your horizontal velocity and time of flight be

Answer 3

< 45: high horizontal velocity and low time or low vertical velocity
> 45: low horizontal velocity and high time or high veritical velocity

Question 4

what kind of angle of projection is ideal if:

• release height > landing height
• release height < landing height

Answer 4

> : low angle of projectioon

<: high angle of projection

Question 5

how to dscribe a projectile moving vertically in second half of parabolic curve

Answer 5

speeding up

Question 6

how to descirbe a projectile moving horizontally at top of flight during trajectory

Answer 6

zero acceleration

Question 7

what is speed right before object hits ground if starting height is high than landing height

Answer 7

greater than initial velocity

Question 8

decribe time and flight and horizontal displacement of two objects: one free falls the other is projected horizontally from same height

Answer 8

• same flight time

- different horizontal displacement