PHY1506 Exam Pack 2025 – Accurate Questions and
Verified Correct Solutions with Rationale
|| 100% Guaranteed Pass
<Latest Version>
PHY1506 Exam Pack – Practice Questions & Verified Solutions
Mechanics
1. Which of the following is a scalar quantity?
a) Force
b) Velocity
c) Acceleration
d) Energy
Answer: d) Energy
Rationale: Energy has magnitude but no direction, making it a scalar. Force,
velocity, and acceleration are vector quantities as they have both magnitude
and direction.
,2. A car travels 60 km North and then 80 km East. What is the magnitude
of the car's displacement?
a) 100 km
b) 140 km
c) 20 km
d) 70 km
Answer: a) 100 km
*Rationale: Displacement is the straight-line distance from start to end.
Using Pythagoras' theorem: √(60² + 80²) = √(3600 + 6400) = √10000 = 100
km.*
3. Newton's First Law of Motion describes:
a) F=ma
b) Action-Reaction pairs
c) The conservation of energy
d) Inertia
Answer: d) Inertia
Rationale: Newton's First Law states that an object at rest stays at rest, and
an object in motion stays in motion with the same velocity unless acted upon
by an unbalanced force. This property is called inertia.
, 4. The acceleration due to gravity on Earth, g, is approximately:
a) 1.6 m/s²
b) 8.9 m/s²
c) 9.8 m/s²
d) 10 m/s²
Answer: c) 9.8 m/s²
Rationale: This is the standard average value for gravitational acceleration
on the surface of the Earth.
5. What is the work done by a force that acts perpendicular to the
direction of displacement?
a) Maximum
b) Minimum
c) Zero
d) It depends on the mass
Answer: c) Zero
*Rationale: Work, W = F·d·cosθ. When θ=90°, cosθ=0, so W=0.*
6. The SI unit of power is the:
a) Joule (J)
b) Newton (N)
Verified Correct Solutions with Rationale
|| 100% Guaranteed Pass
<Latest Version>
PHY1506 Exam Pack – Practice Questions & Verified Solutions
Mechanics
1. Which of the following is a scalar quantity?
a) Force
b) Velocity
c) Acceleration
d) Energy
Answer: d) Energy
Rationale: Energy has magnitude but no direction, making it a scalar. Force,
velocity, and acceleration are vector quantities as they have both magnitude
and direction.
,2. A car travels 60 km North and then 80 km East. What is the magnitude
of the car's displacement?
a) 100 km
b) 140 km
c) 20 km
d) 70 km
Answer: a) 100 km
*Rationale: Displacement is the straight-line distance from start to end.
Using Pythagoras' theorem: √(60² + 80²) = √(3600 + 6400) = √10000 = 100
km.*
3. Newton's First Law of Motion describes:
a) F=ma
b) Action-Reaction pairs
c) The conservation of energy
d) Inertia
Answer: d) Inertia
Rationale: Newton's First Law states that an object at rest stays at rest, and
an object in motion stays in motion with the same velocity unless acted upon
by an unbalanced force. This property is called inertia.
, 4. The acceleration due to gravity on Earth, g, is approximately:
a) 1.6 m/s²
b) 8.9 m/s²
c) 9.8 m/s²
d) 10 m/s²
Answer: c) 9.8 m/s²
Rationale: This is the standard average value for gravitational acceleration
on the surface of the Earth.
5. What is the work done by a force that acts perpendicular to the
direction of displacement?
a) Maximum
b) Minimum
c) Zero
d) It depends on the mass
Answer: c) Zero
*Rationale: Work, W = F·d·cosθ. When θ=90°, cosθ=0, so W=0.*
6. The SI unit of power is the:
a) Joule (J)
b) Newton (N)
