# FREE Mechanical Aptitude Knowledge Question and Answers

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#### The reciprocal of the centripetal force is

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Module 7: Circular Motion has greater details on centripetal force.

#### What distinguishes a cell from a capacitor most significantly?

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The use of circuit elements and symbols are extensively covered in Module 10: Electrical Circuits.

#### A screw with a body diameter of 6mm and a pitch of 1mm must be turned with a 12N force. Determine the driving force influencing the screw. Write the solution in 3 s.f.

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The Physics of Screw is explained in Module 8: Other Simple Machines.

#### Which of the following is TRUE?

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This inquiry relates to circular motion. As a result, it can be resolved by looking at Module 7: Circular Motion.

#### Which of the following substances is magnetic?

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In Module 14: Magnetism, materials that magnetize are mentioned.

#### When a liquid's density doubles and an object is submerged, the pressure of the liquid decreases as follows:

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In Module 9: Pressure, the topic of liquid pressure and its influencing factors is covered.

#### Which one of the following DOES NOT function by magnetism?

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In Module 14: Magnetism, applications of magnetism are discussed.

#### A series circuit has the following benefit(s) over a parallel one:

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In Module 12: Series and Parallel Circuits, specific electric circuit configurations' benefits and drawbacks are discussed.

#### A force of 1200 N holds a load of 300 N. What is the length of the lever in meters if the force is exerted at a location that is 25 cm from the fulcrum?

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Module 1: Levers explains all aspects of levers and their classes, including mathematical calculations.

#### What is the rate of rotation of the Earth's surface, expressed in kilometers per hour? The Earth has a 6370 km radius. Assign a whole number as the answer.

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This is a typical example of circular motion. You will learn how to deal with it after having a look at Module 7: Circular Motion.

#### What value stays the same throughout a ballistic trajectory?

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In Module 6: Ballistics, all necessary information concerning ballistic trajectories is presented.

#### What statement regarding levers is TRUE?

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In Module 1: Levers, a thorough explanation of levers and their attributes is provided.

#### Initially, a gas has a 10 lt volume and a 4 atm pressure. What will the final pressure in cm-Hg be if its volume changes from 20 It to 20 It following a process?

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In Module 11: Gas Pressure, the relationship between pressure and volume of a gas is covered.

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