RECF Mechanical Pre-Test CORRECTLY SOLVED QUESTIONS|SCORE A+

counterclockwise - ️️in order to raise the arm of a roboy, the last of 4 spur gears in a simple gear train must rotate clockwise. in what direction does the input (first) gear turn? 62.8 inches - ️️a robot has wheels with 4 inch diameter. Each wheel rolls 5 revolutions on a horizontal surface without slipping. how far did the robot travel? energy cannot be created or destroyed - ️️which of the following statements is equivalent of the first law of thermodynamics? the condenser on the refrigerator ran constantly - ️️one hot day matt's air conditioner broke. he thought of an idea to cool his house by opening his refrigerator. three hours later his house temperature went up by two degrees. why did this happen? 2.4 ft - ️️two children are playing on a see-saw. the one on the left weighs 80 lbs and the one on the right weighs 100 lbs. if the child on the left is 3 feet from the pivot, how far must the child from the right be for the see-saw to be balanced? spur gears - ️️which of the following types of gears would be found in a parallel shaft gear train? second class lever - ️️what type of simple machine is in the nutcracker pictured? clockwise - ️️a 12 tooth sprocket and a 36 tooth sprocket are connected by a chain. if the 12 tooth sprocket is rotating clockwise, in whag direction is the 36 tooth sprocket turning? 15 mph - ️️suppose an automobile travels 5 miles in 20 minutes. what is the average speed of the car in miles per hour?