ASTB Mechanical Comprehension
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Displacement - ✔✔final position-initial position
Velocity - ✔✔change in position/change in time
Average velocity - ✔✔displacement/change in time
Acceleration - ✔✔change in velocity/change in time
Vertical velocity - ✔✔original vertical velocity-gravity x time
Newton's 1st law - ✔✔A body at rest will tend to stay at rest, while a body in motion
will tend to remain in motion, unless acted upon by an external force
Newton's 2nd law - ✔✔The acceleration of an object is directly proportional to the force
being exherted on in and inversely proportional to its mass. (force = mass*acceleration)
Force equals... - ✔✔Mass x acceleration
Weight equals... - ✔✔mass x gravity(9.8 m/s)
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,Torque equals... - ✔✔radius x force
Work equals... - ✔✔force x displacement
Power equals... - ✔✔work/time
Mechanical Advantage - ✔✔output force/input force
Mechanical advantage: incline - ✔✔slant length/rise
Mechanical advantage: Wedge - ✔✔length/width
Mechanical advantage: Screw - ✔✔2 x pie x radius/length between crests
Mechanical advantage: Lever - ✔✔effort distance/resistance distance
Mechanical advantage: Pulley - ✔✔More amount of connecting ropes gives greater
mechanical advantage
Mechanical Advantage: Wheel and Axle - ✔✔Radius of wheel/radius of axle
Gear Ratio - ✔✔Driving gear/ driven gear or ?:?
Momentum equals... - ✔✔mass x velocity
density equals... - ✔✔mass/volume
pressure equals... - ✔✔force/area
Conduction - ✔✔Transfer of heat through physical contact
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, Convention - ✔✔Transfer of heat through moving fluids(steam)
Radiation - ✔✔Transfer of heat through electromagnetic waves
Voltage(potential energy) equals... - ✔✔current x resistance
Electric power equals... - ✔✔current x voltage or voltage squared/resistance
Scaler - ✔✔has magnitude, but no direction (like mass)
Vector - ✔✔A value that has both magnitude and direction
Gravitational potential energy - ✔✔Gravity x mass x height
When released, gravitational potential energy converts to - ✔✔Kinetic energy
Pascal's Law - ✔✔pressure of fluid mechanics...hydraulics
1 horsepower equals how many watts? - ✔✔746
What happens as air contracts? - ✔✔The air gets colder
Voltimeter? - ✔✔Measures total voltage in a circuit
Hydrometer - ✔✔Measures specific gravity of liquids
Micrometer - ✔✔A gauge that measures small distances or thicknesses between two
faces
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Exam Questions and Answers 100%
Pass
Displacement - ✔✔final position-initial position
Velocity - ✔✔change in position/change in time
Average velocity - ✔✔displacement/change in time
Acceleration - ✔✔change in velocity/change in time
Vertical velocity - ✔✔original vertical velocity-gravity x time
Newton's 1st law - ✔✔A body at rest will tend to stay at rest, while a body in motion
will tend to remain in motion, unless acted upon by an external force
Newton's 2nd law - ✔✔The acceleration of an object is directly proportional to the force
being exherted on in and inversely proportional to its mass. (force = mass*acceleration)
Force equals... - ✔✔Mass x acceleration
Weight equals... - ✔✔mass x gravity(9.8 m/s)
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,Torque equals... - ✔✔radius x force
Work equals... - ✔✔force x displacement
Power equals... - ✔✔work/time
Mechanical Advantage - ✔✔output force/input force
Mechanical advantage: incline - ✔✔slant length/rise
Mechanical advantage: Wedge - ✔✔length/width
Mechanical advantage: Screw - ✔✔2 x pie x radius/length between crests
Mechanical advantage: Lever - ✔✔effort distance/resistance distance
Mechanical advantage: Pulley - ✔✔More amount of connecting ropes gives greater
mechanical advantage
Mechanical Advantage: Wheel and Axle - ✔✔Radius of wheel/radius of axle
Gear Ratio - ✔✔Driving gear/ driven gear or ?:?
Momentum equals... - ✔✔mass x velocity
density equals... - ✔✔mass/volume
pressure equals... - ✔✔force/area
Conduction - ✔✔Transfer of heat through physical contact
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, Convention - ✔✔Transfer of heat through moving fluids(steam)
Radiation - ✔✔Transfer of heat through electromagnetic waves
Voltage(potential energy) equals... - ✔✔current x resistance
Electric power equals... - ✔✔current x voltage or voltage squared/resistance
Scaler - ✔✔has magnitude, but no direction (like mass)
Vector - ✔✔A value that has both magnitude and direction
Gravitational potential energy - ✔✔Gravity x mass x height
When released, gravitational potential energy converts to - ✔✔Kinetic energy
Pascal's Law - ✔✔pressure of fluid mechanics...hydraulics
1 horsepower equals how many watts? - ✔✔746
What happens as air contracts? - ✔✔The air gets colder
Voltimeter? - ✔✔Measures total voltage in a circuit
Hydrometer - ✔✔Measures specific gravity of liquids
Micrometer - ✔✔A gauge that measures small distances or thicknesses between two
faces
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