DYNAMICS FINAL EXAM (DYNAMICS)
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1. A particle moves along a straight line with constant acceleration. Which
kinematic equation correctly relates displacement, initial velocity, time, and
acceleration?
A. v = u + at
B. s = ut + 1/2 at²
C. F = ma
D. p = mv
Answer: B — ✔
Correct answer: s = ut + 1/2 at² ✔
Rationale: The equation for uniformly accelerated motion links
displacement with initial velocity, time, and constant acceleration.
2. A body’s velocity changes from 10 m/s to 30 m/s in 5 s. What is its
acceleration?
A. 2 m/s²
B. 4 m/s²
C. 6 m/s²
D. 10 m/s²
Answer: A — ✔
Correct answer: 4 m/s ÷ 5 s = 4 m/s² ✔
Rationale: Acceleration is the rate of change of velocity over time.
,3. Newton’s First Law is also known as:
A. Law of Acceleration
B. Law of Action-Reaction
C. Law of Inertia
D. Law of Momentum
Answer: C — ✔
Rationale: The law of inertia states a body remains at rest or uniform
motion unless acted upon by a force.
4. A 5 kg object experiences a force of 25 N. Its acceleration is:
A. 2 m/s²
B. 5 m/s²
C. 10 m/s²
D. 125 m/s²
Answer: B — ✔
Rationale: Using F = ma, acceleration = 25/5 = 5 m/s².
5. Momentum is defined as:
A. F × t
B. m × v
C. m × a
D. v ÷ t
Answer: B — ✔
Rationale: Momentum is the product of mass and velocity.
6. The SI unit of impulse is:
A. N
B. N/s
C. N·s
D. kg·m/s²
Answer: C — ✔
Rationale: Impulse = Force × time, unit is Newton-second.
,7. A body in equilibrium must have:
A. Zero velocity
B. Zero acceleration
C. Constant momentum
D. Maximum force
Answer: B — ✔
Rationale: Equilibrium requires net force = 0, hence zero acceleration.
8. Work done is maximum when angle between force and displacement is:
A. 0°
B. 45°
C. 90°
D. 180°
Answer: A — ✔
Rationale: Work = Fd cosθ, maximum when cosθ = 1.
9. The unit of work is:
A. Watt
B. Joule
C. Newton
D. Pascal
Answer: B — ✔
Rationale: Work is measured in Joules (N·m).
10.Power is defined as:
A. Force × distance
B. Work ÷ time
C. Mass × velocity
D. Energy × time
Answer: B — ✔
Rationale: Power is the rate of doing work.
11.A projectile’s horizontal acceleration is:
A. 9.8 m/s²
, B. Constant upward
C. Zero
D. Variable
Answer: C — ✔
Rationale: Horizontal motion is uniform; no acceleration acts horizontally.
12.Maximum height of a projectile occurs when vertical velocity is:
A. Maximum
B. Zero
C. Negative maximum
D. Constant
Answer: B — ✔
Rationale: At peak height, vertical velocity becomes zero.
13.Angular velocity is measured in:
A. m/s
B. rad/s
C. N·m
D. kg·m/s
Answer: B — ✔
Rationale: Angular velocity uses radians per second.
14.Centripetal force acts:
A. Outward
B. Tangentially
C. Toward center
D. Downward only
Answer: C — ✔
Rationale: Centripetal force always points toward the center of rotation.
15.Centripetal acceleration formula is:
A. v²/r
B. r/v
C. mv
Newest 2026-2027 Updated Practice
Exam | 200 Most Tested Questions &
Verified Detailed Answers | Tutor
Verified Success Bundle
1. A particle moves along a straight line with constant acceleration. Which
kinematic equation correctly relates displacement, initial velocity, time, and
acceleration?
A. v = u + at
B. s = ut + 1/2 at²
C. F = ma
D. p = mv
Answer: B — ✔
Correct answer: s = ut + 1/2 at² ✔
Rationale: The equation for uniformly accelerated motion links
displacement with initial velocity, time, and constant acceleration.
2. A body’s velocity changes from 10 m/s to 30 m/s in 5 s. What is its
acceleration?
A. 2 m/s²
B. 4 m/s²
C. 6 m/s²
D. 10 m/s²
Answer: A — ✔
Correct answer: 4 m/s ÷ 5 s = 4 m/s² ✔
Rationale: Acceleration is the rate of change of velocity over time.
,3. Newton’s First Law is also known as:
A. Law of Acceleration
B. Law of Action-Reaction
C. Law of Inertia
D. Law of Momentum
Answer: C — ✔
Rationale: The law of inertia states a body remains at rest or uniform
motion unless acted upon by a force.
4. A 5 kg object experiences a force of 25 N. Its acceleration is:
A. 2 m/s²
B. 5 m/s²
C. 10 m/s²
D. 125 m/s²
Answer: B — ✔
Rationale: Using F = ma, acceleration = 25/5 = 5 m/s².
5. Momentum is defined as:
A. F × t
B. m × v
C. m × a
D. v ÷ t
Answer: B — ✔
Rationale: Momentum is the product of mass and velocity.
6. The SI unit of impulse is:
A. N
B. N/s
C. N·s
D. kg·m/s²
Answer: C — ✔
Rationale: Impulse = Force × time, unit is Newton-second.
,7. A body in equilibrium must have:
A. Zero velocity
B. Zero acceleration
C. Constant momentum
D. Maximum force
Answer: B — ✔
Rationale: Equilibrium requires net force = 0, hence zero acceleration.
8. Work done is maximum when angle between force and displacement is:
A. 0°
B. 45°
C. 90°
D. 180°
Answer: A — ✔
Rationale: Work = Fd cosθ, maximum when cosθ = 1.
9. The unit of work is:
A. Watt
B. Joule
C. Newton
D. Pascal
Answer: B — ✔
Rationale: Work is measured in Joules (N·m).
10.Power is defined as:
A. Force × distance
B. Work ÷ time
C. Mass × velocity
D. Energy × time
Answer: B — ✔
Rationale: Power is the rate of doing work.
11.A projectile’s horizontal acceleration is:
A. 9.8 m/s²
, B. Constant upward
C. Zero
D. Variable
Answer: C — ✔
Rationale: Horizontal motion is uniform; no acceleration acts horizontally.
12.Maximum height of a projectile occurs when vertical velocity is:
A. Maximum
B. Zero
C. Negative maximum
D. Constant
Answer: B — ✔
Rationale: At peak height, vertical velocity becomes zero.
13.Angular velocity is measured in:
A. m/s
B. rad/s
C. N·m
D. kg·m/s
Answer: B — ✔
Rationale: Angular velocity uses radians per second.
14.Centripetal force acts:
A. Outward
B. Tangentially
C. Toward center
D. Downward only
Answer: C — ✔
Rationale: Centripetal force always points toward the center of rotation.
15.Centripetal acceleration formula is:
A. v²/r
B. r/v
C. mv
