Introduction to Dynamics: Master the Fundamentals of Engineering Mechanics

Question 1

Which of the following is a vector quantity?

Accepted Answer

Velocity

Answer

Mass

Answer

Time

Answer

Temperature

Question 2

The moment of inertia of a body about an axis measures its:

Accepted Answer

Resistance to angular acceleration

Answer

Resistance to linear acceleration

Answer

Gravitational force

Answer

Elastic potential energy

Question 3

A simple harmonic oscillator is a system that undergoes:

Accepted Answer

Periodic motion with constant amplitude

Answer

Random motion with varying amplitude

Answer

Damped motion with increasing amplitude

Answer

Forced motion with decreasing amplitude

Question 4

The work done by a force on a particle is:

Accepted Answer

The scalar product of force and displacement

Answer

The vector product of force and displacement

Answer

The scalar product of force and velocity

Answer

The vector product of force and velocity

Question 5

The linear momentum of a closed system is conserved when:

Accepted Answer

No external forces act on it

Answer

External forces cancel each other out

Answer

The system's velocity is constant

Answer

The system's acceleration is constant

Question 6

The tangential and radial components of acceleration for a particle moving in a circle are:

Accepted Answer

Radial is perpendicular, tangential is parallel

Answer

Both parallel to the velocity

Answer

Both perpendicular to the velocity

Answer

Tangential is perpendicular, radial is parallel

Question 7

The potential energy of a body due to gravity is:

Accepted Answer

Directly proportional to the body's height above the ground

Answer

Inversely proportional to the body's mass

Answer

Proportional to the square of the body's velocity

Answer

Independent of the body's acceleration

Question 8

The unit of impulse is:

Accepted Answer

Newton-second

Answer

Newton-meter

Answer

Kilogram-meter per second

Answer

Joule-second

Question 9

The relationship between force, mass, and acceleration is described by:

Accepted Answer

F = ma

Answer

F = mv

Answer

v = at

Answer

a = vt

Question 10

A particle moves in a straight line with constant velocity. Which of the following statements is true about the particle's acceleration in Engineering Mechanics?

Accepted Answer

It is zero

Answer

It is positive

Answer

It is negative

Question 11

Newton's third law of motion states that in Engineering Mechanics:

Accepted Answer

For every action, there is an equal and opposite reaction

Answer

The acceleration of an object is directly proportional to the net force acting on it

Answer

An object at rest will remain at rest unless acted upon by an unbalanced force

Question 12

Which of the following is NOT a type of potential energy in Engineering Mechanics?

Accepted Answer

Kinetic energy

Answer

Gravitational potential energy

Answer

Elastic potential energy

Question 13

Which of the following units is used to measure work in Engineering Mechanics?

Accepted Answer

Joule

Answer

Newton

Answer

Watt

Question 14

Which of the following is NOT a unit of energy?

Accepted Answer

Celsius

Answer

Joule

Answer

Watt

Answer

Newton-meter

Question 15

The work done by a conservative force:

Accepted Answer

Is zero for a closed path

Answer

Is always positive

Answer

Is always negative

Answer

Depends on the path taken

Question 16

The potential energy of an object is:

Accepted Answer

The energy stored in the object due to its position or configuration relative to a reference point

Answer

The energy released by the object when it moves

Answer

The energy required to stop the object

Answer

The energy possessed by the object due to its motion

Question 17

Which of the following is an example of a non-inertial reference frame?

Accepted Answer

A car accelerating on a straight road

Answer

A ball rolling down a frictionless slope

Answer

A satellite orbiting the Earth at a constant speed

Answer

A person standing on a stationary platform

Question 18

The acceleration due to gravity on Earth is approximately what value?

Accepted Answer

9.81 m/s²

Answer

10 m/s²

Answer

11.2 m/s²

Answer

12 m/s²

Question 19

The principle of conservation of energy states that:

Accepted Answer

The total energy of an isolated system remains constant

Answer

Energy can be created or destroyed

Answer

Energy always increases over time

Answer

Energy is always lost over time

Question 20

Which of the following is not a fundamental Newton's law of motion?

Accepted Answer

Law of Work and Energy

Answer

Law of Inertia

Answer

Law of Momentum

Answer

Law of Action and Reaction

Question 21

Which of the following is an example of a conservative force?

Accepted Answer

Gravity

Answer

Friction

Answer

Tension

Answer

Viscous damping

Question 22

The concept of energy conservation is most relevant to which type of system?

Accepted Answer

Conservative

Answer

Non-conservative

Answer

Time-dependent

Answer

Time-independent