OAR Mechanical Comprehension
Scalars correct answersQuantities that are fully described by a magnitude alone.
Vectors correct answersQuantities that are fully described by both a magnitude and a direction.
Distance correct answersScalar quantity that refers to "how much ground an object has covered" during
its motion.
Displacement correct answersVector quantity that refers to "how far out of place an object is" it is the
object's overall change in position.
Speed correct answersScalar quantity that refers to "how fast an object is moving."
Velocity correct answersVector quantity that to "the rate at which an object changes its position."
Force correct answersVector Quantity that describes the force acting up an object.
Contact Forces:
Frictional, Tension, Normal, Air Resistance, Force, Applied, and Spring
Action-at-a-Distance Forces:
Gravitational, Electrical, and Magnetic
Average Speed correct answersAverage Speed =
Distance Traveled/ Time of Travel
, Average Velocity correct answersposition/time = displacement/time
Acceleration correct answersVector quantity that is defined as the rate at which an object changes its
velocity.
Ave. Acceleration correct answersVelocity/Time
Mechanical Advantage correct answersoutput force/input force = MA
Maximum Weight Questions correct answersForce x Mechanical Advantage = MW
If the rope on the end of a pulley system with a MA of 3 is pulled with 160 pounds of force, what is the
maximum weight that can be lifted? correct answers160 x 3 = 480 lbs
Force Necessary Questions correct answersWeight/MA
Mechanical Advantage of an incline plane correct answerslength/height = MA
A 240-pound block is being pulled up an incline by a pulley. The incline is 20 feet long and rises 5 feet.
Neglecting friction, how much force is necessary to move the block up the incline? correct answers20/5
=4
240/4 = 60
Bernoulli's Principle correct answers- The air pressure on top of an airplane wing is less than on the
bottom of the wing. The velocity of wind on top of the wing is greater than below the wing.
- As the velocity of a fluid or gas increases, the pressure decreases.
Inversely Proportional correct answerswhen one value increases, as the other decreases.
Scalars correct answersQuantities that are fully described by a magnitude alone.
Vectors correct answersQuantities that are fully described by both a magnitude and a direction.
Distance correct answersScalar quantity that refers to "how much ground an object has covered" during
its motion.
Displacement correct answersVector quantity that refers to "how far out of place an object is" it is the
object's overall change in position.
Speed correct answersScalar quantity that refers to "how fast an object is moving."
Velocity correct answersVector quantity that to "the rate at which an object changes its position."
Force correct answersVector Quantity that describes the force acting up an object.
Contact Forces:
Frictional, Tension, Normal, Air Resistance, Force, Applied, and Spring
Action-at-a-Distance Forces:
Gravitational, Electrical, and Magnetic
Average Speed correct answersAverage Speed =
Distance Traveled/ Time of Travel
, Average Velocity correct answersposition/time = displacement/time
Acceleration correct answersVector quantity that is defined as the rate at which an object changes its
velocity.
Ave. Acceleration correct answersVelocity/Time
Mechanical Advantage correct answersoutput force/input force = MA
Maximum Weight Questions correct answersForce x Mechanical Advantage = MW
If the rope on the end of a pulley system with a MA of 3 is pulled with 160 pounds of force, what is the
maximum weight that can be lifted? correct answers160 x 3 = 480 lbs
Force Necessary Questions correct answersWeight/MA
Mechanical Advantage of an incline plane correct answerslength/height = MA
A 240-pound block is being pulled up an incline by a pulley. The incline is 20 feet long and rises 5 feet.
Neglecting friction, how much force is necessary to move the block up the incline? correct answers20/5
=4
240/4 = 60
Bernoulli's Principle correct answers- The air pressure on top of an airplane wing is less than on the
bottom of the wing. The velocity of wind on top of the wing is greater than below the wing.
- As the velocity of a fluid or gas increases, the pressure decreases.
Inversely Proportional correct answerswhen one value increases, as the other decreases.
