RIO SALADO PHY 111 FINAL EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
Mechanical energy is not valid in which of the following cases? - ANSWER-A block
sliding down a rough inclined plane
If the force on an object is doubled, which of the following statements is correct? -
ANSWER-Acceleration is increased by two times.
What is the most accurate statement concerning work? - ANSWER-Work on a system
causes a change in the energy of the system.
What is the most accurate statement concerning momentum? - ANSWER-Like other
vector quantities, momentum can be resolved into perpendicular components.
What is the most accurate statement concerning gravitational potential energy? -
ANSWER-The gravitational potential energy (PE) is the energy an object has due to its
position in a gravitational field.
What is the most accurate statement concerning momentum and impulse? - ANSWER-
The net force on an object is equal to the change in momentum of the object wrt time.
What is the most accurate statement concerning angular displacement? - ANSWER-
Angular displacement must be expressed in radians for rotational kinematic equations.
What is the most accurate statement concerning angular momentum? - ANSWER-
Angular momentum is the product of moment of inertia and angular velocity.
What is the most accurate statement concerning rotational work? - ANSWER-Rotational
work on a system causes a change in the energy of the system.
What is the most accurate statement concerning angular velocity? - ANSWER-Angular
velocity, omega, is the change in angular displacement divided by the time interval over
which that change occurred.
What is the most accurate statement concerning torque? - ANSWER-Torque is a vector
cross product, r x F.
QUESTIONS WITH COMPLETE
SOLUTIONS
Mechanical energy is not valid in which of the following cases? - ANSWER-A block
sliding down a rough inclined plane
If the force on an object is doubled, which of the following statements is correct? -
ANSWER-Acceleration is increased by two times.
What is the most accurate statement concerning work? - ANSWER-Work on a system
causes a change in the energy of the system.
What is the most accurate statement concerning momentum? - ANSWER-Like other
vector quantities, momentum can be resolved into perpendicular components.
What is the most accurate statement concerning gravitational potential energy? -
ANSWER-The gravitational potential energy (PE) is the energy an object has due to its
position in a gravitational field.
What is the most accurate statement concerning momentum and impulse? - ANSWER-
The net force on an object is equal to the change in momentum of the object wrt time.
What is the most accurate statement concerning angular displacement? - ANSWER-
Angular displacement must be expressed in radians for rotational kinematic equations.
What is the most accurate statement concerning angular momentum? - ANSWER-
Angular momentum is the product of moment of inertia and angular velocity.
What is the most accurate statement concerning rotational work? - ANSWER-Rotational
work on a system causes a change in the energy of the system.
What is the most accurate statement concerning angular velocity? - ANSWER-Angular
velocity, omega, is the change in angular displacement divided by the time interval over
which that change occurred.
What is the most accurate statement concerning torque? - ANSWER-Torque is a vector
cross product, r x F.
