HESI A2 Physics Exam 2025/2026 –
Verified Questions and 100% Correct
Answers with Rationales
1. Question: What is the SI unit for force?
a) Joule
b) Newton
c) Watt
d) Pascal
Correct Answer: b) Newton
Rationale: The Newton (N) is the SI unit of force, defined as kg·m/s². Joule is energy,
Watt is power, and Pascal is pressure.
2. Question: An object moves with constant velocity. What is its acceleration?
a) Zero
b) Increasing
c) Decreasing
d) Constant but non-zero
Correct Answer: a) Zero
Rationale: Constant velocity means no change in speed or direction, so acceleration
(change in velocity) is zero.
3. Question: According to Newton’s First Law, an object at rest will:
a) Accelerate
b) Remain at rest unless acted upon by a net force
c) Move with constant speed
d) Decelerate
Correct Answer: b) Remain at rest unless acted upon by a net force
Rationale: Newton’s First Law (inertia) states objects maintain their state (rest or
motion) unless a net external force acts.
4. Question: A 10 kg object experiences a 20 N force. What is its acceleration?
a) 0.5 m/s²
b) 2 m/s²
c) 5 m/s²
d) 10 m/s²
Correct Answer: b) 2 m/s²
Rationale: Newton’s Second Law: F = ma. Solve for a: a = F/m = 20 N / 10 kg = 2 m/s².
,5. Question: Newton’s Third Law states that for every action, there is:
a) An equal and opposite reaction
b) A stronger reaction
c) No reaction
d) An equal but parallel reaction
Correct Answer: a) An equal and opposite reaction
Rationale: Action-reaction forces are equal in magnitude, opposite in direction, and act
on different objects.
6. Question: What is the momentum of a 5 kg object moving at 4 m/s?
a) 9 kg·m/s
b) 20 kg·m/s
c) 25 kg·m/s
d) 1 kg·m/s
Correct Answer: b) 20 kg·m/s
Rationale: Momentum = mass × velocity = 5 kg × 4 m/s = 20 kg·m/s.
7. Question: Which quantity is a vector?
a) Speed
b) Mass
c) Velocity
d) Energy
Correct Answer: c) Velocity
Rationale: Velocity includes direction, making it a vector. Speed, mass, and energy are
scalars.
8. Question: The work done by a 10 N force moving an object 5 m is:
a) 2 J
b) 15 J
c) 50 J
d) 100 J
Correct Answer: c) 50 J
Rationale: Work = force × distance × cos(θ). Assuming force and displacement are
parallel (θ = 0, cos(0) = 1), W = 10 N × 5 m = 50 J.
9. Question: Power is defined as:
a) Work × time
b) Work / time
c) Force × distance
d) Mass × acceleration
, Correct Answer: b) Work / time
Rationale: Power is the rate of doing work, measured in watts (J/s).
10. Question: A 2 kg object is lifted 10 m. What is its potential energy? (g = 9.8 m/s²)
a) 98 J
b) 196 J
c) 20 J
d) 49 J
Correct Answer: b) 196 J
Rationale: Potential energy = mgh = 2 kg × 9.8 m/s² × 10 m = 196 J.
11. Question: The kinetic energy of a 3 kg object moving at 4 m/s is:
a) 12 J
b) 24 J
c) 48 J
d) 6 J
Correct Answer: b) 24 J
Rationale: Kinetic energy = ½ mv² = ½ × 3 kg × (4 m/s)² = ½ × 3 × 16 = 24 J.
12. Question: The law of conservation of energy states:
a) Energy can be created
b) Energy can be destroyed
c) Energy is conserved in an isolated system
d) Energy increases with time
Correct Answer: c) Energy is conserved in an isolated system
Rationale: Total energy remains constant; it transforms between forms (e.g., kinetic to
potential).
13. Question: A ball is thrown straight up. At its highest point, its:
a) Kinetic energy is maximum
b) Potential energy is maximum
c) Velocity is maximum
d) Acceleration is zero
Correct Answer: b) Potential energy is maximum
Rationale: At the peak, velocity = 0, so kinetic energy = 0, and potential energy is
maximum. Acceleration (g) remains constant.
14. Question: The unit of power, watt, is equivalent to:
a) N·m
b) J/s
c) kg·m/s²
d) N/s
Verified Questions and 100% Correct
Answers with Rationales
1. Question: What is the SI unit for force?
a) Joule
b) Newton
c) Watt
d) Pascal
Correct Answer: b) Newton
Rationale: The Newton (N) is the SI unit of force, defined as kg·m/s². Joule is energy,
Watt is power, and Pascal is pressure.
2. Question: An object moves with constant velocity. What is its acceleration?
a) Zero
b) Increasing
c) Decreasing
d) Constant but non-zero
Correct Answer: a) Zero
Rationale: Constant velocity means no change in speed or direction, so acceleration
(change in velocity) is zero.
3. Question: According to Newton’s First Law, an object at rest will:
a) Accelerate
b) Remain at rest unless acted upon by a net force
c) Move with constant speed
d) Decelerate
Correct Answer: b) Remain at rest unless acted upon by a net force
Rationale: Newton’s First Law (inertia) states objects maintain their state (rest or
motion) unless a net external force acts.
4. Question: A 10 kg object experiences a 20 N force. What is its acceleration?
a) 0.5 m/s²
b) 2 m/s²
c) 5 m/s²
d) 10 m/s²
Correct Answer: b) 2 m/s²
Rationale: Newton’s Second Law: F = ma. Solve for a: a = F/m = 20 N / 10 kg = 2 m/s².
,5. Question: Newton’s Third Law states that for every action, there is:
a) An equal and opposite reaction
b) A stronger reaction
c) No reaction
d) An equal but parallel reaction
Correct Answer: a) An equal and opposite reaction
Rationale: Action-reaction forces are equal in magnitude, opposite in direction, and act
on different objects.
6. Question: What is the momentum of a 5 kg object moving at 4 m/s?
a) 9 kg·m/s
b) 20 kg·m/s
c) 25 kg·m/s
d) 1 kg·m/s
Correct Answer: b) 20 kg·m/s
Rationale: Momentum = mass × velocity = 5 kg × 4 m/s = 20 kg·m/s.
7. Question: Which quantity is a vector?
a) Speed
b) Mass
c) Velocity
d) Energy
Correct Answer: c) Velocity
Rationale: Velocity includes direction, making it a vector. Speed, mass, and energy are
scalars.
8. Question: The work done by a 10 N force moving an object 5 m is:
a) 2 J
b) 15 J
c) 50 J
d) 100 J
Correct Answer: c) 50 J
Rationale: Work = force × distance × cos(θ). Assuming force and displacement are
parallel (θ = 0, cos(0) = 1), W = 10 N × 5 m = 50 J.
9. Question: Power is defined as:
a) Work × time
b) Work / time
c) Force × distance
d) Mass × acceleration
, Correct Answer: b) Work / time
Rationale: Power is the rate of doing work, measured in watts (J/s).
10. Question: A 2 kg object is lifted 10 m. What is its potential energy? (g = 9.8 m/s²)
a) 98 J
b) 196 J
c) 20 J
d) 49 J
Correct Answer: b) 196 J
Rationale: Potential energy = mgh = 2 kg × 9.8 m/s² × 10 m = 196 J.
11. Question: The kinetic energy of a 3 kg object moving at 4 m/s is:
a) 12 J
b) 24 J
c) 48 J
d) 6 J
Correct Answer: b) 24 J
Rationale: Kinetic energy = ½ mv² = ½ × 3 kg × (4 m/s)² = ½ × 3 × 16 = 24 J.
12. Question: The law of conservation of energy states:
a) Energy can be created
b) Energy can be destroyed
c) Energy is conserved in an isolated system
d) Energy increases with time
Correct Answer: c) Energy is conserved in an isolated system
Rationale: Total energy remains constant; it transforms between forms (e.g., kinetic to
potential).
13. Question: A ball is thrown straight up. At its highest point, its:
a) Kinetic energy is maximum
b) Potential energy is maximum
c) Velocity is maximum
d) Acceleration is zero
Correct Answer: b) Potential energy is maximum
Rationale: At the peak, velocity = 0, so kinetic energy = 0, and potential energy is
maximum. Acceleration (g) remains constant.
14. Question: The unit of power, watt, is equivalent to:
a) N·m
b) J/s
c) kg·m/s²
d) N/s
