Question

An automobile accident investigator needs to determine the initial westerly velocity of jeep (m=1720 kg) that may have been speeding before colliding head-on with a Volkswagen (m=1510 kg) that was moving with a velocity of 75.7 km/h east. The speed limit on this road is 90 km/h. After the collision, the jeep and the Volkswagen stuck together and continued to travel with a velocity of 15.5 km/h west.

a) Find the initial westerly velocity of the jeep.
b) Was the jeep speeding?

Answer 1

initial momentum west
= 1720 v -1510(75.7)

= final momentum west
= (1720+1510)15.5

Answer 2

a jeep with the voicing of 1720kg collided with a volkswagen m=1510kg that was moving 75.7 km/east. The speed limit on the Road was 90km/h leaving the jeep and the volkswagen stuck together continuing with the volicity of 15.5 km.west. I need the anwser written step by step finding the volicity of the jeeps original speed?

Answer 3

M(j)V(j)-M(v)V(v)=(M(j)+M(v))V' M(j)=m-jeep, M(v)=m-Volkswagen
1720V(j)-1510(75.7)=(1720+1510)15.5 V(j)= jeep's velocity
1720V(j)-114307=50065 V(v)=Volkswagen's velocity
1720V(j)=164372 V'=velocity of jeep & Volkswagen
V(j)=95.5 km/h