Rio Salado PHY 111 Final 2025-2026 Most Recent
Version Comprehensive 80 Questions and
Verified Answers Accurate Solutions Already
Graded A+ Get it 100% Correct
A heavy solid disk rotating freely and slowed down by only by friction applied at its outer
edge takes 100 s to come to a stop. If the disk had twice the radius and twice the mass,
but the frictional force remained the same, what is the time for the disk to come to rest
from the same initial rotational speed? - CORRECT ANSWER: 400 s
A horizontal beam is supported horizontally. It is attached to the wall by a small hinge.
The force that the hinge exerts ON THE BEAM has components - CORRECT
ANSWER: downward and to the left.
A person pushes vertically downward with force P on a lever of length L that is inclined
at angle θ above the horizontal. What is the torque produced by the force P about the
pivot point? - CORRECT ANSWER: PL cos θ
A simple pendulum has a period T on the Earth. If it were used on Planet X, where the
acceleration due to gravity is 3 times what it is on Earth, its period would be which of the
following? - CORRECT ANSWER: T√ (1/3)
A student is sitting on a frictionless rotating stool with her arms outstretched holding
equal heavy weights in each hand. If she suddenly lets go of the weights, her angular
speed will - CORRECT ANSWER: Remain the same
A weight W swings from a hook in the ceiling by a light string of length L. T is the tension
in the string. When the string makes an angle θ with the vertical, what is the net torque
about the hook? - CORRECT ANSWER: WL sin θ
, For an object undergoing simple harmonic motion, - CORRECT ANSWER: the
acceleration is greatest when the displacement is greatest.
Four uniform objects having the same mass and diameter are released simultaneously
from rest at the same distance above the bottom of a hill and roll down without slipping.
The objects are a solid sphere, a solid cylinder, a hollow cylinder and a thin-walled
hollow cylinder. Which of these objects will be the last one to reach the bottom of the
hill? - CORRECT ANSWER: The thin-walled hollow cylinder
Four uniform objects having the same mass and diameter are released simultaneously
from rest at the same distance above the bottom of a hill and roll down without slipping.
The objects are a solid sphere, a solid cylinder, a hollow cylinder, and a thin-walled
hollow cylinder. Which of these objects will be the first one to reach the bottom of the
hill? - CORRECT ANSWER: The solid sphere
If the force on an object is doubled, which of the following statements is correct? -
CORRECT ANSWER: Acceleration is increased by two times.
If the torques on an object balance, then it follows that this object - CORRECT
ANSWER: cannot have any angular momentum.
Mechanical energy is not valid in which of the following cases? - CORRECT ANSWER:
A block sliding down a rough inclined plane
Two points are on a disk that rotates about an axis perpendicular to the plane of the disk
at its center. Point B is 3 times as far from the axis as Point A. If the linear speed of
point B is v , then the linear speed of point A is - CORRECT ANSWER: v/3.
What is the most accurate statement concerning an object undergoing simple harmonic
motion (SHM)? - CORRECT ANSWER: The object's velocity is maximum as it passes
the equilibrium position.
Version Comprehensive 80 Questions and
Verified Answers Accurate Solutions Already
Graded A+ Get it 100% Correct
A heavy solid disk rotating freely and slowed down by only by friction applied at its outer
edge takes 100 s to come to a stop. If the disk had twice the radius and twice the mass,
but the frictional force remained the same, what is the time for the disk to come to rest
from the same initial rotational speed? - CORRECT ANSWER: 400 s
A horizontal beam is supported horizontally. It is attached to the wall by a small hinge.
The force that the hinge exerts ON THE BEAM has components - CORRECT
ANSWER: downward and to the left.
A person pushes vertically downward with force P on a lever of length L that is inclined
at angle θ above the horizontal. What is the torque produced by the force P about the
pivot point? - CORRECT ANSWER: PL cos θ
A simple pendulum has a period T on the Earth. If it were used on Planet X, where the
acceleration due to gravity is 3 times what it is on Earth, its period would be which of the
following? - CORRECT ANSWER: T√ (1/3)
A student is sitting on a frictionless rotating stool with her arms outstretched holding
equal heavy weights in each hand. If she suddenly lets go of the weights, her angular
speed will - CORRECT ANSWER: Remain the same
A weight W swings from a hook in the ceiling by a light string of length L. T is the tension
in the string. When the string makes an angle θ with the vertical, what is the net torque
about the hook? - CORRECT ANSWER: WL sin θ
, For an object undergoing simple harmonic motion, - CORRECT ANSWER: the
acceleration is greatest when the displacement is greatest.
Four uniform objects having the same mass and diameter are released simultaneously
from rest at the same distance above the bottom of a hill and roll down without slipping.
The objects are a solid sphere, a solid cylinder, a hollow cylinder and a thin-walled
hollow cylinder. Which of these objects will be the last one to reach the bottom of the
hill? - CORRECT ANSWER: The thin-walled hollow cylinder
Four uniform objects having the same mass and diameter are released simultaneously
from rest at the same distance above the bottom of a hill and roll down without slipping.
The objects are a solid sphere, a solid cylinder, a hollow cylinder, and a thin-walled
hollow cylinder. Which of these objects will be the first one to reach the bottom of the
hill? - CORRECT ANSWER: The solid sphere
If the force on an object is doubled, which of the following statements is correct? -
CORRECT ANSWER: Acceleration is increased by two times.
If the torques on an object balance, then it follows that this object - CORRECT
ANSWER: cannot have any angular momentum.
Mechanical energy is not valid in which of the following cases? - CORRECT ANSWER:
A block sliding down a rough inclined plane
Two points are on a disk that rotates about an axis perpendicular to the plane of the disk
at its center. Point B is 3 times as far from the axis as Point A. If the linear speed of
point B is v , then the linear speed of point A is - CORRECT ANSWER: v/3.
What is the most accurate statement concerning an object undergoing simple harmonic
motion (SHM)? - CORRECT ANSWER: The object's velocity is maximum as it passes
the equilibrium position.
