Posted by **Lycra** on Friday, April 13, 2012 at 6:01am.

A truck of mass 2000kg travelling due south collides at an intersection with a car of mass 1200kg travelling due east. The car and truck become entangled and move off to the south-east. The truck driver claims to have been travelling at exactly 60km/hr(the speed limit) just prior to impact. Determine whether the car was exceeding the speed limit.

- physics -
**drwls**, Friday, April 13, 2012 at 7:00am
To have a final southeast direction, the initial momenta of the truck and car must have been equal in magnitude.

If the heavier truck was travelling at the 60 km/h speed limit, the car must have been going 100 km/h.

(100*1200) = (60*2000)

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