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Unformatted text preview: The spring is initially unstretched. The mass m is attached to the spring and then allowed to drop. What is the distance it falls before the spring brings it to a halt? 4) A car of mass 50 slugs moving at speed v to the right collides head on with a truck of mass 100 slugs moving at a speed of 50ft/sec to the left. After the collision the two vehicles stick together and move together at a speed of 10ft/sec to the left. What was the speed, v, of the car before the collision? _____________________________________________________________________ PE g = mg z; PE sp = (1/2)kx 2 ; ; T=(1/2)mv 2 a r = r r 2 ; a = r + 2r ; a n = v 2 / ; a t = s...
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- Spring '10