Chapter 1 Flashcards
Was Galileo Galilei a contemporary of Sir Isaac Newton?
No, Galileo preceded Newton. (False)
Can Newton’s laws apply without modification to any non-rotating frame moving at constant speed relative to an absolute frame of reference?
Yes. (True)
Q: Does the zero vector have a unique magnitude?
Yes, it is always zero. (False)
What does mass represent in Newtonian mechanics?
It represents a body’s resistance (sluggishness) to changes in motion by an applied force.
Are the SI system base units independent of the Earth’s gravitational field?
Yes, the SI system is an absolute system of units. (True)
What are the fundamental base units in the SI system corresponding to mass, length, and time?
Kilogram (kg), meter (m), and second (s).
What are the base units in the U.S. customary system?
Slug, foot, and second.
Is force in an MLT system considered a primary or secondary physical quantity?
Secondary.
What does a dimensionally consistent equation mean?
The units on both sides of the equation are equivalent.
What is the SI unit of force?
Newton (N) equal to kgm/s^2
What is the English unit of force?
Pound-force
.
What is the SI unit of energy?
Joule (J), equal to kgm^2/s^2
What is the English unit of energy?
Foot-pound (ft·lbf), the energy to apply 1 lbf over a distance of 1 foot.
What is the SI unit of pressure?
Pascal (Pa), equal to N/m² or kg/(m·s²).
What is the English unit of pressure?
Pounds per square inch (psi), the force in lbf per square inch.
What is the SI unit of power?
Watt (W), equal to J/s or kg·m²/s³.
What is the English unit of power?
Horsepower (hp), equal to 550 ft·lbf/s.
What is the SI unit of work?
Joule (J), the same as energy (kg·m²/s²).
What is the English unit of work?
Foot-pound (ft·lbf).
