Engineering Mechanics, Dynamics exam with correct answers 2025

Engineering Mechanics,
Dynamics 2025




What is the branch of engineering mechanics which refers to the study of stationary rigid body?

A. Statics

B. Kinetics

C. Kinematics

D. Dynamic - Correct answer-A. Statics



What is the branch of engineering mechanics which refers to the study of rigid body in motion under the
action of forces?

A. Statics

B. Strenght of materials

C. Kinematics

D. Dynamics - Correct answer-D. Dynamics

,What is the branch of engineering mechanics which refers to the study of rigid body in motion without
reference to the force that causes the motion?

A. Statics

B. Kinetics

C. Kinematics

D. Dynamics - Correct answer-C. Kinematics



dynamics

a science which deals with the action of forces on bodies in motion.

Displacement

the displacement of a point is a directed distance from some reference point.

Velocity

defined as the time rate of change of displacement in a particular direction. Units m/s. A vector quantity

Speed

defined as the time rate of change of displacement without any reference to direction. A scalar quantity.

Acceleration

defined as the time rate of change of velocity. Units m/s².

Relative Velocity

relative velocity of a point A relative to B is obtained by adding vectorially the actual velocity of A to the
reversed velocity of B.




What refers to the force that holds part of the rigid body together?

A. Natural force

B. External force

C. Internal force

D. Concentrated force - Correct answer-C. Internal force



What refers to a pair of equal, opposite and parallel forces?

,A. Couple

B. Moment

C. Torque

D. All of the above - Correct answer-A. Couple




What is a concurrent force system?

A. All forces act at the same point.

B. All forces have the same line of action.

C. All forces are parallel with one another.

D. All forces are in the same plane. - Correct answer-A. All forces act at the same point.



When will a three-force member be considered in equilibrium?

A. When the sum of the two forces is equal to the third force.

B. When they are concurrent or parallel.

C. When they are coplanar.

D. All of the above - Correct answer-B. When they are concurrent or parallel.



A roller support has how many reactions?

A. None

B. 1

C. 2

D. 3 - Correct answer-B. 1



A link or cable support has how many reactions?

A. None

B. 1

, C. 2

D. 3 - Correct answer-B. 1



A build-in, fixed support has how many reactions and moment?

A. 1 reaction and 1 moment

B. 2 reactions and 1 moment

C. 1 reaction and 2 moments

D. 2 reactions and no moment - Correct answer-B. 2 reactions and 1 moment



Which support has one moment?

A. Frictionless guide

B. Pin connection

C. Fixed support

D. Roller - Correct answer-C. Fixed support



What is the science that describes and predicts the effect on bodies at rest or in motion by forces acting
on it?

A. Engineering Mechanics

B. Theory of Structures

C. Mechanics of Materials

D. Strength of Materials - Correct answer-A. Engineering Mechanics



What refers to a negligible body when compared to the distances involved regarding its motion?

A. Particle

B. Atomic substance

C. Element

D. Quarks - Correct answer-A. Particle



The resulting force of a distributed load is always acting at: