8. For machines whose mechanica advantage is gt 1 the output force is always __ than the input force. Less than Greater than Equal to GREEN RED PURPLE 9. The amount of work performed in a given time. Mechanical Efficiency Power Advantage ORANGE YELLOW RED 10. How much force is required I to open a paint can if the mechanical advantage is 10 and a screwdriver applies 55 N of force? 550 N 0.2 N 5.5 N BLUE YELLOW ORANGE 11. How does a pulley make work easier? By changing By increasing By decreasing the direction of effort force mechanical

8. For machines whose mechanical advantage is greater than 1, the output force is always greater than the input force. Therefore, the correct answer is "Greater than" (RED).<br /><br />9. The amount of work performed in a given time is referred to as "Power." Therefore, the correct answer is "Power" (YELLOW).<br /><br />10. To find the force required to open a paint can, we can use the formula:<br />\[ \text{Force required} = \frac{\text{Applied force}}{\text{Mechanical advantage}} \]<br />Given that the mechanical advantage is 10 and the applied force is 55 N, we can substitute these values into the formula:<br />\[ \text{Force required} = \frac{55 \text{ N}}{10} = 5.5 \text{ N} \]<br />Therefore, the correct answer is "5.5 N" (ORANGE).<br /><br />11. A pulley makes work easier by changing the direction of the effort force. Therefore, the correct answer is "By changing the direction of effort force" (BLUE).