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10 Cards in this Set

  • Front
  • Back
QUESTION
What is a vector?
ANSWER
A vector is a physical quantity that requires both direction and magnitude fora complete description.
QUESTION
What is force?
ANSWER
Force is a push or pull that causes a change in motion of an object.
QUESTION
Name the four energy systems.
ANSWER
The four energy systems are mechanical system,fluid system, electrical system, and the thermal system.
QUESTION
Is mass and weight the same thing?
ANSWER
No, mass is a measure of the amount of matter in an object(unchanged with its location) and weight is the measure of the pull of the earth on the object.
QUESTION
List the four prime movers.
ANSWER
1)force
2)pressure
3)voltage
4)pressure difference
QUESTION
What is torque?
ANSWER
Torque is a forcelike quantity in the rotational mechanical system measured in Pound-feet or Newton-meters
QUESTION
ANSWER
QUESTION
What is specific gravity?
ANSWER
It is a dimensionless number that comares the density of a substance with that of water.
QUESTION
What is density?
ANSWER
It is the mass per unit volume of a gas, liquid, or solid substance.
QUESTION
What is a scalar?
ANSWER
A scalar is a physical quantity that requires only magnitude for its description.