Inelastic Collisions in Two Dimensions: a Car Heading North Collides

question 1

Multiple Choice

Inelastic collisions in two dimensions: A car heading north collides at an intersection with a truck of the same mass as the car heading east. If they lock together and travel at 28 m/s at 46° north of east just after the collision, how fast was the car initially traveling? Assume that any other unbalanced forces are negligible.

• A) 40 m/s
• B) 20 m/s
• C) 80 m/s
• D) 30 m/s

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