RIO SALADO PHY 111 EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
*Core Domains*
*Kinematics and Motion*
*Dynamics and Newton's Laws*
*Work, Energy, and Conservation*
*Rotational Motion and Torque*
*Fluid Mechanics and Solids*
*Thermodynamics and Heat Transfer*
*Vibrations and Wave Theory*
*Sound and Acoustic Principles*
*Introduction*
This comprehensive assessment is designed to evaluate mastery of fundamental physics
principles within the PHY 111 curriculum. The exam focuses on the application of algebra-
based physics to real-world scenarios, testing the student's ability to analyze physical
systems and solve complex problems. Covering mechanics, thermodynamics, and wave
phenomena, the assessment utilizes multiple-choice questions that require both
,conceptual understanding and mathematical proficiency. Candidates are expected to
demonstrate critical thinking through scenario-based inquiries that reflect professional
standards in scientific inquiry and technical decision-making. This evaluation ensures a
rigorous verification of the skills necessary for advanced academic and professional
pursuits in technical fields.
1. A car travels 50 km North and then 20 km South. What is the total displacement of
the car?
A. 70 km North
B. 30 km North
C. 30 km South
D. 70 km South
🟢 B. 30 km North
🔴 Explanation: Displacement is a vector quantity representing the change in position.
Since North and South are opposite directions, the net displacement is 50 km - 20 km =
30 km in the original direction of North.
2. Which of the following is a scalar quantity?
,A. Velocity
B. Acceleration
C. Mass
D. Force
🟢 C. Mass
🔴 Explanation: Scalar quantities have only magnitude and no direction. Mass remains
constant regardless of direction, whereas velocity, acceleration, and force are vectors
requiring directional components.
3. An object is dropped from a height. Neglecting air resistance, what is its acceleration
after 2 seconds?
A. 4.9 m/s²
B. 9.8 m/s²
C. 19.6 m/s²
D. 0 m/s²
🟢 B. 9.8 m/s²
🔴 Explanation: In the absence of air resistance, all objects near the surface of the Earth
experience a constant acceleration due to gravity, which is approximately 9.8 m/s²,
regardless of the time elapsed.
, 4. A ball is thrown horizontally from a cliff. What happens to its horizontal velocity
(neglecting air resistance)?
A. It increases steadily
B. It decreases until it hits the ground
C. It remains constant
D. It drops to zero immediately
🟢 C. It remains constant
🔴 Explanation: In projectile motion, there are no horizontal forces acting on the object
(ignoring air resistance). According to Newton's First Law, the horizontal velocity remains
constant throughout the flight.
5. Which of Newton's Laws best explains why a passenger in a car lurches forward
when the brakes are applied suddenly?
A. First Law
B. Second Law
C. Third Law
D. Law of Gravitation
🟢 A. First Law
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM
UPDATE
*Core Domains*
*Kinematics and Motion*
*Dynamics and Newton's Laws*
*Work, Energy, and Conservation*
*Rotational Motion and Torque*
*Fluid Mechanics and Solids*
*Thermodynamics and Heat Transfer*
*Vibrations and Wave Theory*
*Sound and Acoustic Principles*
*Introduction*
This comprehensive assessment is designed to evaluate mastery of fundamental physics
principles within the PHY 111 curriculum. The exam focuses on the application of algebra-
based physics to real-world scenarios, testing the student's ability to analyze physical
systems and solve complex problems. Covering mechanics, thermodynamics, and wave
phenomena, the assessment utilizes multiple-choice questions that require both
,conceptual understanding and mathematical proficiency. Candidates are expected to
demonstrate critical thinking through scenario-based inquiries that reflect professional
standards in scientific inquiry and technical decision-making. This evaluation ensures a
rigorous verification of the skills necessary for advanced academic and professional
pursuits in technical fields.
1. A car travels 50 km North and then 20 km South. What is the total displacement of
the car?
A. 70 km North
B. 30 km North
C. 30 km South
D. 70 km South
🟢 B. 30 km North
🔴 Explanation: Displacement is a vector quantity representing the change in position.
Since North and South are opposite directions, the net displacement is 50 km - 20 km =
30 km in the original direction of North.
2. Which of the following is a scalar quantity?
,A. Velocity
B. Acceleration
C. Mass
D. Force
🟢 C. Mass
🔴 Explanation: Scalar quantities have only magnitude and no direction. Mass remains
constant regardless of direction, whereas velocity, acceleration, and force are vectors
requiring directional components.
3. An object is dropped from a height. Neglecting air resistance, what is its acceleration
after 2 seconds?
A. 4.9 m/s²
B. 9.8 m/s²
C. 19.6 m/s²
D. 0 m/s²
🟢 B. 9.8 m/s²
🔴 Explanation: In the absence of air resistance, all objects near the surface of the Earth
experience a constant acceleration due to gravity, which is approximately 9.8 m/s²,
regardless of the time elapsed.
, 4. A ball is thrown horizontally from a cliff. What happens to its horizontal velocity
(neglecting air resistance)?
A. It increases steadily
B. It decreases until it hits the ground
C. It remains constant
D. It drops to zero immediately
🟢 C. It remains constant
🔴 Explanation: In projectile motion, there are no horizontal forces acting on the object
(ignoring air resistance). According to Newton's First Law, the horizontal velocity remains
constant throughout the flight.
5. Which of Newton's Laws best explains why a passenger in a car lurches forward
when the brakes are applied suddenly?
A. First Law
B. Second Law
C. Third Law
D. Law of Gravitation
🟢 A. First Law
