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• What is the approximate drag force on boxy semi-truck moving at 70 mph (103 ft/sec)? Solution
  
  
• What is the approximate drag force on a 1 foot diameter pier post submerged 8 feet in a current flowing 6 mph (8.8 ft/sec)? Solution

• A bucket of cement being lifted by a crane weighs 2500 pounds. The lift rate is 10 ft/sec. What shaft horsepower is needed? Solution
  
  
• Estimate the horsepower required to maintain a boxy semi-truck at 70 mph (103 ft/sec.) Frontal area is about 100 square feet. Solution
  
  
• Estimate the horsepower required to run up a flight of stairs, if one weighs 150 lbs, the staircase rises 10 feet, and the person does it in 6 seconds (actual measurement by a physics class.) Solution

• Estimate the terminal velocity of a falling masonry brick (weight 5 lbs; frontal area 4 in. x 8 in., or 0.22 sq. ft.) How many feet must it fall to reach this velocity? Solution
  
  
• A weather radiosonde is released from its balloon, but the parachute fails. What will its terminal velocity be? If the release altitude is 15,0000 feet, will it reach this speed? Weight = 100 lbs, area = 2 sq ft. Solution

• What is the approximate maximum height and distance reached by a basketball which is tossed at a 45 degree angle at 35 feet/second? Solution
  
  
• What is the approximate maximum height and distance reached by a golf ball hit 200 feet/second off the tee at a 37 degree angle? Solution