Mahmood is lifting a bag of cement. he uses 5 n of force to lift the bag 20 meters. if mahmood uses a machine to decrease the distance to 10 meters, he will

decrease the amount of work done
increase the amount of work done
decrease the amount of force needed
increase the amount of force needed

Answer;

Decrease the amount of force needed

Explanation;A machine does not decrease the amount of work that is done. Instead, a machine changes the way in which work is done. Recall that work is the use of force to move an object.Machines are used to make work easier by reducing the force needed. They do not decrease the amount of work.Machines make work easier to do by decreasing the force required by increasing the distance over which the work is done.

The horse latitudes-high-pressure zones about 30 degrees north and 30 degrees south of the equator.-warm air traveling away from the equator cools and sinks-weather tends to be clear and drythe doldrums-low-pressure near equator-air rises and spreads out toward the poles-rising moist air produces clouds and heavy rainthe westerlies-blow from the west-move from the horse latitudes toward the poles.-bring storms across much of the united statesthe tradewinds-blow from the east-move from the horse latitudes toward the equator  -strong, steady winds

Answer: fn = wcos50 = 38.89(9.81)(cos50) = 245.23 n