What is work? (ch7) - correct answer Work is done on an object by a force when the object moves through a distance.
Work equation (no trig) (ch7) -
... [Show More] correct answer W= F(vector)d(vector)
Is work a vector quantity? (ch7) - correct answer No (it is a scalar quantity, although it is the product of two vector quantities)
Scalar product of any two vectors A and B (ch7) - correct answer ABcosθ
Work equation (trig) (ch7) - correct answer W=Fdcosθ
What is kinetic energy? (ch7) - correct answer energy of motion (an object in motion has the ability to do work)
What is energy? (ch7) - correct answer the ability to do work
(Translational) kinetic energy equation (ch7) - correct answer K=½mv²
Work-energy principle (words) (ch7) - correct answer The net work done on an object is equal to the change in the object's kinetic energy
Work-energy principle (equation) (ch7) - correct answer Wnet=∆K=½mv₁²-½mv₂²
What is a conservative force? (ch8) - correct answer (A force for which) the work done by it in moving an object from one position to another depends only on the two positions and NOT on the path taken (**Path independent**)
What is the difference, other than the definition, between conservative forces such as mechanical energy and non conservative forces such as friction? (ch8) - correct answer The work done by a conservative force is recoverable
What is potential energy? (ch8) - correct answer Energy associated with conservative forces that depend on the position or configuration of objects
Gravitational potential energy equation (ch8) - correct answer Ugrav=mgh (h=height above some reference point)
Elastic potential energy equation (ch8) - correct answer U=½kx²
what is the x in the elastic potential energy equation? (ch8) - correct answer distance from its natural (unstretched/uncompressed) length
Mechanical energy symbol and definition (ch8) - correct answer E is the sum of kinetic and potential energies
Law of conservation of energy definition (ch8) - correct answer the total energy of a system is always conserved
When is mechanical energy conserved (within a system) ? (ch8) - correct answer when only conservative forces act in that system
What is power? (2 defs) (ch8) - correct answer the rate at which work is done, or the rate at which energy is transformed from one form to another
Power equation (ch8) - correct answer P= F(vector)v(vector)
Newton's First Law of Motion (Law of inertia) - correct answer if the net force on an object is zero, then an object originally at rest remains at rest and an object in motion remains in motion in a straight line with constant velocity
Newton's Second Law of Motion - correct answer the acceleration of an object is directly proportional to the net force acting on it, and inversely proportional to the mass (∑F=ma)
Newton's Third Law of Motion - correct answer whenever one object exerts a force on a second object, the second object always exerts a force on the first object that is equal in magnitude but opposite in direction
Linear momentum (equation) (ch9) - correct answer p(vector)=mv(vector)
Is momentum a vector quantity? (ch9) - correct answer yes
Law of conservation of momentum (ch9) - correct answer the total momentum of an isolated system of objects remains constant
impulse (symbol and definition) (ch9) - correct answer J, change in momentum (pfinal-pinitial)
elastic collision (definiton) (ch9) - correct answer a collision in which kinetic energy is conserved
is impulse a vector quantity? (ch9) - correct answer yes
What is the result of a completely inelastic collision? (ch9) - correct answer the colliding objects stick together
What is the unit for K? - correct answer N/m
What is a Joule? - correct answer Nm
What unit is momentum in? - correct answer Ns
What are watts? - correct answer Joules per second [Show Less]