A spring is 6 cm long when it is unstretched but is stretched to 9 cm when a mass is hung from it. What is the extension of the spring?
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Jeremy accidently dropped his toy stuffed animal from the balcony of his apartment on the fourth floor. The toy hit the ground at a velocity of 16.0 meters/second. At impact, it took 2.0 seconds for the toy’s velocity to reach 0 meters/second. If the toy has a mass of 0.25 kilograms, what's the force of the impact? Use F = ma, where .
The force of the impact is how many newtons.
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