ENGINEERING MECHANICS

ENGINEERING MECHANICS: DYNAMICS (EMD) –
TEST EXAM QUESTIONS AND CORRECT ANSWERS
VEIFIED ANSWERS PLUS RAIONALES 2025/2026 Q&A
| INSTANT DOWNLOAD PDF


1. The branch of mechanics which deals with motion of bodies without considering the cause
of motion is called:

A) Kinetics
B) Kinematics
C) Statics
D) Dynamics
Correct: B) Kinematics — It studies motion without reference to forces.



2. The rate of change of displacement is called:

A) Velocity
B) Acceleration
C) Speed
D) Momentum
Correct: A) Velocity — It is the first derivative of displacement with respect to time.



3. The rate of change of velocity is:

A) Displacement
B) Acceleration
C) Jerk
D) Momentum
Correct: B) Acceleration — It represents change of velocity per unit time.



4. If a particle moves with uniform velocity, its acceleration is:

,A) Zero
B) Constant
C) Infinite
D) Varying
Correct: A) Zero — Because there is no change in velocity.



5. The area under a velocity-time graph represents:

A) Acceleration
B) Displacement
C) Force
D) Power
Correct: B) Displacement — Integration of velocity with respect to time gives displacement.



6. Newton’s Second Law states that force equals:

A) Mass × Displacement
B) Mass × Acceleration
C) Mass / Acceleration
D) Momentum × Time
Correct: B) Mass × Acceleration — F = ma.



7. The product of mass and velocity of a body is:

A) Force
B) Momentum
C) Energy
D) Power
Correct: B) Momentum — It measures motion quantity of a body.



8. The impulse of a force is equal to the:

A) Rate of change of momentum
B) Change of momentum
C) Force × Acceleration

,D) Work done
Correct: B) Change of momentum — Impulse = ∫Fdt = Δp.



9. Work is defined as:

A) Force × Velocity
B) Force × Displacement
C) Force / Displacement
D) Mass × Acceleration
Correct: B) Force × Displacement — When displacement is in the direction of force.



10. The kinetic energy of a body of mass m moving with velocity v is:

A) mv²
B) ½mv²
C) mgh
D) mgv
Correct: B) ½mv² — Derived from work-energy principle.



11. The potential energy of a body at height h is given by:

A) ½mv²
B) mgh
C) mg/v
D) mv/h
Correct: B) mgh — It depends on mass, gravity, and height.



12. The law of conservation of energy states that:

A) Energy is created from mass
B) Energy cannot be created or destroyed
C) Energy is always increasing
D) Energy decreases with work
Correct: B) Energy cannot be created or destroyed — Only transformed.

, 13. The motion of a projectile is a combination of:

A) Vertical and circular motion
B) Linear and angular motion
C) Horizontal and vertical motion
D) Rotational and translational motion
Correct: C) Horizontal and vertical motion — The two are independent.



14. The path of a projectile is:

A) Circular
B) Elliptical
C) Parabolic
D) Linear
Correct: C) Parabolic — Under constant gravitational acceleration.



15. The maximum height of a projectile depends on:

A) Initial speed only
B) Angle of projection only
C) Vertical component of velocity
D) Air resistance
Correct: C) Vertical component of velocity — Since h = (u²sin²θ)/(2g).



16. The time of flight of a projectile is given by:

A) (2u sin θ)/g
B) (u² sin² θ)/2g
C) (u cos θ)/g
D) (u/g)
Correct: A) (2u sin θ)/g — From vertical motion equations.



17. The range of a projectile is maximum when angle of projection is:

A) 0°
B) 30°
C) 45°