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Q. A car crashes into a wall at 25 m/s and is brought to a rest in 0.1 s. Show that the average force exerted on a 75-kg test dummy by the seat belt is more than 18,000 N.

Q. What is your displacement after running 2.5 {rm km} on Strawberry Fields, 1.4 {rm km} on Penny Lane, and 4.2 {rm km} on Abbey Road?

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