Travel Writing 2.0
Physics questions?
1. A crane raises a 150 N weight to a height of 2.0 m in in 5.0 s. The crane does work at a rate of?
2. A car with mass M traveling at speed V has kinetic energy K. What is the kinetic energy of a second car that has the same mass M and twice the speed of the first car?
3. Find the amount of work done in vertically lifting a steel beam of mass 600. kg at uniform speed through a distance of 38.0 m.
Remember to identity all of your data, write the equation, and show your work.
<< A crane raises a 150 N weight to a height of 2.0 m in in 5.0 s. The crane does work at a rate of? >>
Power = Work/Time
Power = (150)(2)/5
Power = 60 joules/sec = 60 watts
<< A car with mass M traveling at speed V has kinetic energy K. What is the kinetic energy of a second car that has the same mass M and twice the speed of the first car?>>
KE of first car = (1/2)MV^2
KE of second car = (1/2)M(2V)^2 = 2MV^2
The kinetic energy of the second car is twice that of the first car.
<< Find the amount of work done in vertically lifting a steel beam of mass 600. kg at uniform speed through a distance of 38.0 m. >>
Work done = (600)(9.8)(38) = 223,440 joules
RE your instructions "Remember to identity all of your data, write the equation, and show your work" --- the least you can do is add the word PLEASE..
Dispatches 2.0 | ep7.0 | Life at The Word | Sarah Johnson
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