Physics

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 280 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 =8400 N/m.
h=4m
Spring at angle with unknown L, length, with block hanging and unknown angle
3m to spring end and 7m rest of horizontal rod with the block at the end of rod at 7m end.

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