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20 questions
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- Q11. What is the SI unit of work?WattKilogramNewtonJoule30sSC8.E.1
- Q22. Which class of lever has the load between the effort and fulcrum?None of the aboveThird-class leverSecond-class leverFirst-class lever30s
- Q33. How does a wedge work?Converts force to perpendicular directionConverts force into motionNone of the aboveDivides force30s
- Q44. What is an inclined plane used for?Change work requiredReduce energyIncrease force neededReduce force needed30s
- Q55. A pulley changes:Magnitude of forceDirection of forceNone of the aboveBoth direction and magnitude30s
- Q66. A wedge is primarily used to:Split objectsTransfer motionLift objectsRotate objects30s
- Q77. In a first-class lever, the fulcrum is:Between the effort and loadCloser to the effortAt the edgeCloser to the load30s
- Q88. What mechanical advantage does an inclined plane provide?Increases effortDecreases efficiencyIncreases displacementReduces force required30s
- Q99. A movable pulley reduces:DisplacementEffortWorkEnergy30s
- Q1010. How does the radius of a wheel and axle affect its function?Larger wheel reduces effortSmaller wheel reduces effortEffort is unchangedBoth have no effect30s
- Q1111. Calculate the force needed to move a 300 N load up a 5 m ramp of height 3 m.150 N300 N100 N180 N30s
- Q1212. In a block-and-tackle pulley system with 4 ropes, the effort required to lift a 400 N load is:100 N400 N200 N50 N30s
- Q1313. If a lever's effort arm is 2 m and the load arm is 1 m, what is its mechanical advantage?210.5330s
- Q1414. A screw has a pitch of 2 mm and a handle radius of 10 cm. What is the mechanical advantage?62831450010030s
- Q1515. A wheel radius is 20 cm, and axle radius is 5 cm. What is the mechanical advantage?125430s