8.7 - Projectile motion 1

Question 1

define a projectile

Answer 1

an object acted upon only by gravity

Question 2

what are the 3 main principles that apply to all projectiles

Answer 2

• a = g, this is always downwards and affect the vertical motion only
• horizontal motion is constant (a = 0)
• the horizontal and vertical motions are INDEPENDENT of another

Question 3

equations for calculating vertical projection (of a projectile’s);

1- final velocity

2-displacement

Answer 3

1- v= u-gt

2- s = ut-0.5gt²

Question 4

what does link horizontal and vertical motion

Answer 4

time to reach a certan displacement

Question 5

the equation for finding horizontal displacement of a projectile

Answer 5

s=ut

Question 6

the equation for finding vertical displacement of a projectile

Answer 6

s = 0.5gt²

(s=ut-o.5at², u=0)

Question 7

comparing the path of a ball dropped to a ball thrown horizontally

• which ball reaches the ground first

Answer 7

they reach the ground at the same time

Question 8

horizontal projection graph with horizontal and vertical displacement calc

Answer 8