OAR Mechanical Study Guide Questions with Complete Solutions (Latest 2025) Which of the following provides the best definition for what "strength" would be, in terms of materials? - Correct Answers ✅its ability to maintain shape Which of the following can cause an object to accelerate?
- Correct Answers ✅Force
What is the primary distinguishing factor between speed and velocity? - Correct Answers ✅Displacement in time What type of energy might you have at the top of a roller coaster? - Correct Answers ✅Potential energy What is the center of gravity of an object? - Correct Answers ✅the point where the object can be balanced What is the definition of viscosity? - Correct Answers ✅the ease with which a fluid can flow Two footballs have been placed 60 centimeters apart.They are identical in every way. Where is the center of gravity relative to the second football? ___ centimeters away toward football 1 - Correct Answers ✅30 1 / 3
OAR Mechanical Study Guide Questions with Complete Solutions (Latest 2025) Removing a nail using a claw hammer is an example of you using _____ to assist yourself - Correct Answers ✅mechanical advantage When would you not need to use a pump? - Correct Answers ✅Move water downhill Which of the following is an example of a simple machine? - Correct Answers ✅screw Which of the following is an example of a complex machine? - Correct Answers ✅crank If gear 1 turns clockwise, which way does gear 2 turn (assuming they are connected)? - Correct Answers ✅counter clockwise What kind of force is used to slow down a car? - Correct Answers ✅Friction What is the formula that is used to calculate work? - Correct Answers ✅W = F x S 2 / 3
OAR Mechanical Study Guide Questions with Complete Solutions (Latest 2025) If an engine with a power output of around 2 horsepower is 95% efficient, what would the actual power output be, in horsepower? - Correct Answers ✅1.90 A class 2 lever has the load placed between the fulcrum/pivot point and the effort being placed on it.Which of these might be an example of this? - Correct Answers ✅wheelbarrow Force per unit of distance is a description of what? - Correct Answers ✅work Which one of the following might be a good example of a simple machine? - Correct Answers ✅ladder A machine is operating with an input (for work) of 215- foot pounds. The output of the work for this machine is 204.25-foot pounds. What efficiency does this machine have, considering the information above? - Correct Answers ✅95% If there are 20 lbs. on one side of a fulcrum (with equal lengths on both sides), which of the following combinations of weights would be enough to balance the loads on that fulcrum? - Correct Answers ✅18 and 2
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