Chapter 6: Projectiles

Question 1

Horizontal motion formula

Answer 1

S = vt

Question 2

The horizontal motion of a projectile is modelled as having….

Answer 2

constant velocity (a=0)

Question 3

The vertical motion of a projectile is modelled as having….

Answer 3

a constant acceleration due to gravity (a=g)

Question 4

Vertical motion formula

Answer 4

SUVAT (Usually S = ut + 1/2 at^2)

Question 5

Ux =

Answer 5

u x cosß

Question 6

Uy =

Answer 6

u x sinß (sometimes -u x sinß if going downards)

Question 7

Steps to tackle projectiles questions:

Answer 7

• Draw Diagram
• If angle split up horizontal and vertical velocity
• Find Horizontal component s = vt
• Find Vertical component suvat
• If needed simultaneous equation

Question 8

Usual Limitations for projectile models:

Answer 8

• Used gravity as rounded
• wind effects
• not modelled as a particle
• ball dynamics
• air resistance / rotational forces

Question 9

When finding a projection remember..

Answer 9

The horizontal component is constant

Question 10

When finding the greatest height…

Answer 10

Let v = 0, for vertical component

Question 11

If Collide…

Answer 11

vertical velocity must be constant throughout