When the 13-lb block A is released from rest it lifts the two 18-lb weights B and C. Neglect the weight of the cord and the size of the pulleys. (Figure 1) Determine the maximum distance A will fall before its motion is momentarily stopped.

Consider the figure above, where a rigid beam of negligible mass and 10 m long is supported by a cable attached to a spring.  When NO block is hung from the beam, the length L (cable-spring) is equal to 5 m.  Assume that immediately after block (weight of 260 N) is hung at the end of the beam the spring  does not stretch, calculate the tension under this assumption.  Using this tension find how much the spring stretches.  Express the amount the spring is stretched in cm.  k =8275 N/m.

Tension force has units of ________. Check all that apply 1kg 2m/s 3N 4m/s2 5kg m/s2 6Tesla (T)

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