FORCES - MORE QUESTIONS

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 PDF FILE - CLICK HERE FOR PRINTABLE WORKSHEET 3. Another crow-bar is used to lever a load of 120N. The load is 2m from the fulcrum and the effort is 6m from the fulcrum. What effort is required to move the load ? Clockwise moments = 120 N x 2 m Anticlockwise moments = effort x 6m In equilibrium; clockwise moments = anti-clockwise moments 120 x 2 = effort x 6 effort = 120 x 2           6 effort = 240           6 = 40 N An effort of over 40 N is required to move the load. 4. A wheel-barrow is used to lift a load of 150N. The wheel acts as the fulcrum. Calculate the effort required. Clockwise moments = 150 N x .5 m Anticlockwise moments = effort x 1.5m In equilibrium; clockwise moments = anti-clockwise moments 150 x .5 = effort x 1.5 effort = 150 x .5             1.5   effort = 75            1.5   = 50 N An effort of over 50 N is required to lift the wheel-barrow. TRY THE FOLLOWING QUESTIONS 5. A wheel-barrow is used to lift a load of 200N. The wheel acts as the fulcrum. Calculate the effort required. 6. A metal bar is used to lever a load of 150N. The load is 1m from the fulcrum and the effort is 6m from the fulcrum. What effort is required to move the load ? 7. Another metal bar is used to lever a load of 200N. The load is 3m from the fulcrum and the effort is 2m from the fulcrum. What effort is required to move the load ? CLICK HERE FOR FORCES AND MOMENTS INDEX PAGE

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