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10. A 12 N force acts 0.50 m; 11. A 20 N force acts 30 cm
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10. A 12 N force acts 0.50 m to the right of a pivot. Calculate its moment and state the direction.
11. A 20 N force acts 30 cm to the left of a pivot. Calculate the moment in N m.
12. A seesaw has a 150 N downward force 1.2 m to the left. What downward force, 1.5 m to the right, will balance it?
13. A beam has 8 N acting 0.4 m left of the pivot and 6 N acting 0.7 m right. Calculate both moments and the resultant momen
14. A delivery robot travels 60 m in 20 s, stops for 15 s, then travels another 90 m in 30 s. Find (a) its speed during each
15. A beam has downward forces of 10 N at 0.6 m LEFT and 4 N at 0.5 m RIGHT. A third downward force acts 0.4 m RIGHT. Calcul
16. A pupil says: “A flat section of a distance–time graph means the object has zero distance from home.” Explain the mistak
17. CHALLENGE: A car travels at 12 m/s for 20 s, then at 18 m/s for 10 s. Draw a distance–time graph and calculate the avera
9. FINISHED EARLY? Write two original questions: one involving a distance–time graph and one involving balanced moments. In
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