Kinematics

Question 1

What is kinematics?

Answer 1

Study of motion without concern for the forces causing it

Question 2

Displacement =

Answer 2

Average velocity x time

Question 3

Average velocity =

Answer 3

(initial velocity + final velocity) / 2

Question 4

Acceleration =

Answer 4

Change in velocity / time
vf - vi / t

Question 5

Final velocity =

Answer 5

initial velocity + (acceleration x time)
vi + (at)

Question 6

Another displacement equation …

Answer 6

(vi x t) + (1/2at^2)

Question 7

Another final velocity equation…

Answer 7

vf^2 = vi^2 + 2ad

Question 8

An object in free fall …

Answer 8

Moves down under constant acceleration (-10m/s^2)

Question 9

Describe velocity during free fall

Answer 9

Initial velocity is 0, and velocity increases as object travels down

Question 10

What is the equation for free fall?

Answer 10

y = 1/2gt^2

Question 11

Projectile motion:
Only ___ involved is ___
Motion in x (____) and y (___) direction are ___
No ___ acceleration, so ___ ___ remains constant

Answer 11

Only force involved is gravity
Motion in x (horizontal) and y (vertical) direction are independent
No horizontal acceleration, so horizontal velocity remains constant

Question 12

Projectile motion: Horizontal velocity
Initial horizontal velocity determined using ___ of ___ velocity
Equation:

Answer 12

Determined by using cos of initial velocity
Equation: vx = vcos(angle)

Question 13

Projectile motion: vertical motion
Initial vertical velocity determined using ___ of ___ velocity
Equation:

Answer 13

Determined by using sin of initial velocity
Equation: vy = vsin(angle)

Question 14

Projectile motion: peak of the curve …
___ velocity = 0
Though ___ velocity remains constant

Answer 14

Vertical velocity = 0
Horizontal velocity remains constant