Introduction to Dynamics: Master the Fundamentals of Motion

Question 1

The trajectory of a projectile in the absence of air resistance is:

Accepted Answer

A parabolic curve

Answer

A straight line

Answer

A circular path

Answer

An elliptical path

Question 2

The acceleration of a particle in rectilinear motion is defined as:

Accepted Answer

Rate of change of velocity with time

Answer

Rate of change of displacement with time

Answer

Rate of change of acceleration with time

Answer

Rate of change of force with time

Question 3

The relative acceleration of a particle moving with respect to a non-inertial reference frame is:

Accepted Answer

The acceleration of the particle as measured in an inertial frame plus the acceleration of the frame

Answer

The acceleration of the particle as measured in an inertial frame minus the acceleration of the frame

Answer

The acceleration of the particle as measured in the non-inertial frame

Answer

The acceleration of the frame

Question 4

Work done by a constant force acting on a particle is:

Accepted Answer

The product of force and displacement in the direction of the force

Answer

The product of force and velocity

Answer

The product of force and acceleration

Answer

The product of force and time

Question 5

The power of an engine is measured in:

Accepted Answer

Watts

Answer

Newtons

Answer

Joules

Answer

Horsepower

Question 6

Which of the following best states Newton's first law of motion?

Accepted Answer

An object either at rest or moving at a constant velocity will stay in this state unless an external unbalanced force acts upon it.

Answer

The acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass.

Answer

For every action, there is an equal and opposite reaction.

Question 7

A particle undergoes a straight-line motion with constant acceleration. Which graph below accurately represents its velocity plotted against time?

Accepted Answer

A linear graph with a positive gradient

Answer

A linear graph with a negative gradient

Answer

A parabolic graph

Question 8

A car covers a distance of 100 meters in 10 seconds. What is its average velocity?

Accepted Answer

10 m/s

Answer

5 m/s

Answer

100 m/s

Question 9

Which of these is not a type of curvilinear motion?

Accepted Answer

Rectilinear motion

Answer

Projectile motion

Answer

Circular motion

Question 10

From the perspective of a passenger in a train moving at a constant velocity, a ball thrown forward will:

Accepted Answer

Move forward in a straight line

Answer

Move backward in a straight line

Answer

Follow a curved trajectory

Question 11

Which of these is a unit of force?

Accepted Answer

Newton

Answer

Joule

Answer

Watt

Question 12

According to Newton's second law of motion, the force acting on an object is directly proportional to:

Accepted Answer

Mass and acceleration

Answer

Mass and displacement

Answer

Velocity and acceleration

Answer

Mass, velocity, and time

Question 13

An object moving with a constant velocity has:

Accepted Answer

Zero acceleration

Answer

Non-zero acceleration

Answer

Changing velocity

Answer

Zero displacement

Question 14

Which of the following describes curvilinear motion?

Accepted Answer

Motion along a curved path

Answer

Motion along a straight line

Answer

Motion with constant acceleration

Answer

Motion with zero velocity

Question 15

Relative motion is the:

Accepted Answer

Motion of an object relative to another object

Answer

Motion of an object relative to a fixed point

Answer

Motion of an object relative to the ground

Answer

Motion of an object relative to itself

Question 16

Which of the following is a fundamental unit of force in the SI system?

Accepted Answer

Newton

Answer

Kilogram

Answer

Pound

Answer

Joule

Question 17

The coefficient of restitution is a measure of:

Accepted Answer

Elasticity of a collision

Answer

Inelasticity of a collision

Answer

Rigidity of a collision

Answer

Plasticity of a collision

Question 18

According to Newton's first law of motion, an object at rest will remain at rest unless acted upon by an external force. Which of the following is the correct interpretation of this law?

Accepted Answer

An object will maintain its state of motion unless acted on by an external force.

Answer

An object in motion will slow down to rest without external force.

Question 19

A particle undergoes motion in a straight line with a constant acceleration of 2 m/s^2. If its initial velocity is 5 m/s, calculate its displacement after 10 seconds.

Accepted Answer

125 m

Answer

100 m

Answer

150 m

Question 20

A projectile is launched at an angle of 30 degrees to the horizontal with an initial velocity of 20 m/s. Calculate its horizontal velocity component.

Accepted Answer

17.32 m/s

Answer

10 m/s

Answer

28.28 m/s

Question 21

A particle moves in a circular path of radius 5 m with a constant speed of 10 m/s. Determine its angular velocity.

Accepted Answer

2 rad/s

Answer

3 rad/s

Answer

1 rad/s

Question 22

Consider two particles moving in a straight line with the same constant velocity. Describe their relative motion.

Accepted Answer

They are stationary relative to each other.

Answer

They are moving with different speeds in the opposite direction.

Answer

They are moving with the same speed and in the opposite direction.