# Homework Help: Help needed - collision of two snowmobiles

1. Mar 26, 2013

### vintage20

Help needed -- collision of two snowmobiles

1. The problem statement, all variables and given/known data

A police officer arrives at the scene of a collision of the two snowmobiles to find both drivers unconscious. When two vehicles collided, their skis became entangled and the two snowmobiles remained locked together as they skidded to a stop. One driver was thrown clear of the mishap, but the other driver remained in the drivers seat. The posted speed limit in the area is 60km/h. One witness described how driver A was thrown horizontally at a constant speed from his seat (0.5 m above the snow surface) to his final resting position.

the initial angle between driver A and Driver B is 30 degrees

Driver A was thrown 8m

Mass of Driver A 80kg

Mass of driver B 90kg

Mass of vehicle A 270 kg

Mass of vehicle B 310kg

Before collision: Vehicle B East30degrees North Vehicle A East

Direction of entangles vehicles after collision East 15 degrees North

length if final skid 18m

displacement of driver A from point of impact: 8m

Time from impact to end skid 2.5s

I need to determine the initial velocities of both snowmobiles.

2. Relevant equations

3. The attempt at a solution
Va: ΔD/ΔV= 8/0.32=25m/s
and
vb= 14.4m/s