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Another Conundrum

The very large garbage truck of mass M and a sporty Miata sports car of mass m have equal momentum. Which vehicle takes the most work to stop and can you derive the equations that supports your answer?

Comments

This is a classic question where the reaction to the answer is usually "No way! That can't be right!" Consider Newton's 3rd Law of Motion for the 'unreasonable' answer. BruceS
The answer is in two definitions: the definitions for momentum and kinetic energy.
BruceS
OOPS! The comment above ("This is a classic question ...") belongs with the story about the truck and the Miata. Sorry...fat fingers! BruceS