# Lolicon Slayer Johnson

Topics: Diagram, Venn diagram / Pages: 4 (307 words) / Published: Mar 19th, 2015
1)
Objective

Investigate the velocity immediately after the collision.

Givens

SUV: 3000 kg; Accleration of SUV brake locked: ­2 m/s 2
Subaru: 2000 kg; Accleration of Subaru braked locked : ­3 m/s 2
The initial velocity of Subaru is 0 m/s speed limit: 35 km/hr distance traveled after collision: 22 m

unknown

the initial velocity after collision

theory and equation Elasticity of collision
Kinematics
1 a • d = V f 2 − V i 2
2

assumption

the final velocity after they collide and traveled 22 m is 0.

Work

F1+F2 = Ffinal
F final = 3000kg • (− 2m/s 2) + 2000kg • (− 3m/s 2) =− 12000N

a final =

−12000N
5000 kg

=− 2.4m/s 2

• (− 2.4m/s 2) • 22m = 0 2 − V i 2
V i = 10.276 m/s Vi is the velocity immediately after the collision.
1
2

diagram

2)

Objective

Determine the initial velocity of SUV before collision

Givens Variables

M1 : SUV: 3000 kg; Accleration of SUV brake locked: ­2 m/s 2
M2 : Subaru: 2000 kg; Accleration of Subaru braked locked : ­3 m/s 2
The initial velocity of Subaru is 0 m/s speed limit: 35 km/hr distance traveled after collision: 22 m
Vi velocity immediately after collision: 10.276 m/s
V2 velocity of Subaru before collision

Unknowns
Variables

V1 initial velocity of SUV before collision

Theory/Equations
/Laws

momentum law of conservation of energy
M 1 • V 1 + M 2 • V 2 = M total • V i

Assumptions

since this is an elastic collision, the Pi = Pf, energy is conserved.

Work

Pi=Pf
M 1 • V 1 + M 2 • V 2 = M total • V i
3000kg x V1i + 2000kg x

Diagrams

3) Since after the collision, the SUV sticks into the Outback Wagon and moves together, there for the collision is an elastic collision, and there is no kinetic energy lost in the collision.