Ch. 5, 6, and 8

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21 questions

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- Q1Samantha uses 50 N of force to move a dresser 10 meters. How much work did she do?5 J500 J40 J60 J30sEditDelete
- Q2Mechanical advantage of a machine is the ratio ofwork x powerforce/distanceinput force/output forceoutput force/input force30sEditDelete
- Q3Which one is an example of a 2nd class lever?lifting a barbellhammer removing a nailseesawwheelbarrow30sEditDelete
- Q4The Law of Inertia is Newton's ___________________.4th law2nd law3rd law1st law30sEditDelete
- Q5A seesaw is an example of a _______________.1st class lever2nd class lever3rd class lever4th class lever30sEditDelete
- Q6If an incline plane is 10 meters high with a length of 30 meters, what is the mechanical advantage?3402030030sEditDelete
- Q7What uses a combination of two or more simple machines?compound machinecomplex machine30sEditDelete
- Q8What is an example of a wedge?fulcrumrampscrewdriveraxe30sEditDelete
- Q9What is not an example of acceleration?moving fastergoing slowerturning a cornerresting30sEditDelete
- Q10It took Gary 30 seconds and 75 Newtons of force to move a box 5 meters. How much power did he exert?110 W2 W450 W12.5 W30sEditDelete
- Q11Work has been done when _____________.force and distance are in opposite directionsforce and distance are in the same direction30sEditDelete
- Q12What is the amount of work completed in a certain period of time called?mechanical advantagepowerefficiencymotion30sEditDelete
- Q13An object will fall faster when the acceleration is lower due to gravity.TrueFalse30sEditDelete
- Q14How many hours will it take a car to travel 800 miles if their average speed is 50 mph?16 hours6.25 hours15 hours12 hours30sEditDelete
- Q15250,000 J of work is needed and it will take 50 seconds to complete the project. How much power is needed? p = w / t0.0002 J/s50,000 J/s500 J/s5000 J/s30sEditDelete
- Q16An 8th grader rides a bike at an average speed of 5 miles per hour. If he rides for 3 hours how far can he travel?0.6 miles8 miles15 miles1.67 miles30sEditDelete
- Q17A mover pushes a crate with a mass of 22 kg at a speed of 2.8 m/s/s. How much force does the mover use to push the crate?7.85 N24.8 N61.6 N0.13 N30sEditDelete
- Q18Which law explains why we need to wear seatbelt?1st3rd4th2nd30sEditDelete
- Q19Which law states that for every action there is an equal and opposite reaction?4th3rd2nd1st30sEditDelete
- Q20A mom pushes a stroller with 23 N of force moving at 18 meters. How much work was done?1.28 J414 J0.78 J41 J30sEditDelete