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    Using a 1-meter crowbar to lift a 50-kg rock. The crowbar is placed over a small rock set .25 meters from the end of the crowbar, which is placed under the rock. The crowbar is set at a 30-degree angle from the ground. I need to figure out how much effort must be applied to the crowbar to lift the rock and what kind of lever this is.

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    Please refer attachment.

    A is the 50 kg rock (weight = mg = 490 N). B is the small rock upon which is placed the crowbar whose one end is placed below the big rock. Distance between A and B along the crowbar is 0.25m. Total length of the crowbar is 1m. It makes ...

    Solution Summary

    The efforts required for lifting a rock using a crowbar lever is determined.