Introduction to Dynamics: Master the Fundamentals of Motion and Forces

Question 1

A particle travels with a constant velocity of 5 m/s. Calculate its displacement after 10 seconds.

Accepted Answer

50 m

Answer

5 m

Answer

10 m

Answer

100 m

Question 2

In the SI system, which of the following is not a fundamental unit?

Accepted Answer

Newton

Answer

Meter

Answer

Kilogram

Answer

Second

Question 3

When a force of 10 N is applied to a body for 5 seconds, calculate the impulse exerted on the body.

Accepted Answer

50 N

Answer

2 N

Answer

10 N

Answer

100 N

Question 4

Identify the vector quantity among the following.

Accepted Answer

Velocity

Answer

Mass

Answer

Temperature

Answer

Time

Question 5

For a body to be in equilibrium, the sum of all forces acting on it should be:

Accepted Answer

Zero

Answer

Non-zero

Answer

Equal

Answer

Opposite

Question 6

A particle moves in a circular path of radius 5 meters. If it completes one revolution in 10 seconds, calculate its angular velocity.

Accepted Answer

1 rad/s

Answer

0.5 rad/s

Answer

2 rad/s

Answer

5 rad/s

Question 7

How can the work-energy theorem be used to analyze the motion of a roller coaster?

Accepted Answer

Equate the work done by gravity to the change in kinetic energy.

Answer

Equate the work done by friction to the change in potential energy.

Answer

Equate the work done by the motor to the change in thermal energy.

Question 8

Which of the following is a scalar quantity describing only magnitude?

Accepted Answer

Displacement

Answer

Velocity

Answer

Acceleration

Answer

Force

Question 9

Newton's second law of motion states that:

Accepted Answer

Net force on an object equals its mass times its acceleration.

Answer

Acceleration of an object is linearly proportional to the net force applied to it.

Answer

Acceleration of an object is inversely proportional to its mass.

Answer

Acceleration of an object is equal to the vector sum of forces acting on it.

Question 10

Which of the following is NOT a fundamental type of friction?

Accepted Answer

Kinetic friction

Answer

Rolling friction

Answer

Sliding friction

Answer

Static friction

Question 11

Kinetic energy of an object is:

Accepted Answer

Energy due to its motion.

Answer

Energy due to its position.

Answer

Energy due to its deformation.

Answer

Energy due to its chemical composition.

Question 12

Work done by a force is:

Accepted Answer

Force applied multiplied by displacement in the force's direction.

Answer

Force applied divided by displacement in the force's direction.

Answer

Displacement multiplied by force applied perpendicular to its direction.

Answer

Force applied multiplied by displacement opposite to its direction.

Question 13

Which of the following is the SI unit of power?

Accepted Answer

Watt

Answer

Newton

Answer

Joule

Answer

Kilogram

Question 14

Moment of inertia of an object is a measure of its:

Accepted Answer

Resistance to angular acceleration.

Answer

Resistance to linear acceleration.

Answer

Resistance to twisting.

Answer

Resistance to bending.

Question 15

The primary purpose of a flywheel is to:

Accepted Answer

Store and gradually release energy.

Answer

Reduce the speed of a rotating shaft.

Answer

Increase the torque of a rotating shaft.

Answer

Change the direction of a rotating shaft.

Question 16

A particle moves with constant acceleration. Which of the following statements is incorrect about its motion?

Accepted Answer

Distance traveled is always greater than displacement.

Answer

Velocity is proportional to time.

Answer

Displacement is proportional to the square of time.

Answer

Acceleration is constant.

Question 17

A force of 100 N is applied to a body of mass 20 kg for 5 seconds. What is the change in momentum of the body?

Accepted Answer

500 kg m/s

Answer

100 kg m/s

Answer

1000 kg m/s

Answer

2000 kg m/s

Question 18

A ball is thrown at an angle of 45° with an initial velocity of 10 m/s. Which of the following correctly describes its trajectory?

Accepted Answer

It rises to a maximum height and then falls symmetrically.

Answer

It travels in a straight line at 45°.

Answer

It rises to a maximum height and then falls at a different angle.

Answer

It falls immediately due to gravity.

Question 19

What is the SI unit for work?

Accepted Answer

Joule

Answer

Newton-meter

Answer

Watt

Answer

Pound-foot

Question 20

An elastic collision is characterized by:

Accepted Answer

Conservation of both total kinetic energy and total momentum.

Answer

Conservation of total kinetic energy.

Answer

Conservation of total momentum.

Answer

Conservation of neither total kinetic energy nor total momentum.

Question 21

The moment of inertia of a body about an axis depends on:

Accepted Answer

Both mass and mass distribution

Answer

Mass of the body

Answer

Distribution of mass about the axis of rotation

Answer

Neither mass nor mass distribution

Question 22

A rigid body is in equilibrium when subjected to:

Accepted Answer

Both zero net force and zero net torque.

Answer

Zero net force.

Answer

Zero net torque.

Answer

Neither zero net force nor zero net torque.

Question 23

A particle moves along a straight line with constant acceleration of 2 m/s². If its initial velocity is 5 m/s, what will be its velocity after 3 seconds?

Accepted Answer

11 m/s

Answer

7 m/s

Answer

13 m/s

Answer

15 m/s

Question 24

A projectile is launched vertically upward with an initial velocity of 20 m/s. What is its maximum height?

Accepted Answer

20 m

Answer

10 m

Answer

30 m

Answer

40 m

Question 25

Two objects collide elastically. Which statement is true?

Accepted Answer

Both total momentum and kinetic energy are conserved

Answer

Total momentum is conserved

Answer

Total kinetic energy is conserved

Answer

Neither total momentum nor kinetic energy is conserved

Question 26

A rigid body rotates about a fixed axis. Which quantity is a measure of its rotational inertia?

Accepted Answer

Moment of inertia

Answer

Mass

Answer

Angular velocity

Answer

Torque

Question 27

A flywheel is rotating at a constant angular velocity. What is the net torque acting on it?

Accepted Answer

Zero

Answer

Positive

Answer

Negative

Answer

Cannot be determined

Question 28

Which assumption is key in the analysis of simple machines?

Accepted Answer

Friction is negligible

Answer

Machines are 100% efficient

Answer

Machines are ideal levers

Answer

Machines have no moving parts

Question 29

A particle moves along a straight line with constant acceleration 'a'. The displacement of the particle during 't' seconds is:

Accepted Answer

1/2at^2

Answer

at^2

Answer

at

Answer

1/2at

Question 30

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

Accepted Answer

Acceleration

Answer

Velocity

Answer

Momentum

Answer

Displacement

Question 31

Which of the following is **not** a type of momentum?

Accepted Answer

Gravitational Momentum

Answer

Linear Momentum

Answer

Angular Momentum

Answer

Kinetic Momentum

Question 32

The three equations of motion of a rigid body are known as:

Accepted Answer

Newton's Equations of Motion

Answer

Lagrange's Equations

Answer

Euler's Equations

Answer

Poisson's Equations

Question 33

Which of the following is a vector quantity?

Accepted Answer

Velocity

Answer

Mass

Answer

Temperature

Answer

Volume

Question 34

The principle of conservation of energy states that the total energy of an isolated system:

Accepted Answer

Remains constant

Answer

Decreases over time

Answer

Increases over time

Answer

Fluctuates randomly

Question 35

An object is moving in a circular path at a constant speed. Which type of motion does this object exhibit?

Accepted Answer

Rotational motion

Answer

Translational motion

Answer

Linear motion

Answer

Projectile motion

Question 36

According to Newton's Second Law of Motion, the acceleration of an object is:

Accepted Answer

Directly proportional to the net force applied to the object

Answer

Inversely proportional to the mass of the object

Answer

Equal to the net force applied to the object

Answer

Independent of the mass of the object

Question 37

Momentum is a vector quantity that:

Accepted Answer

Describes the motion of an object

Answer

Is a measure of the amount of mass an object has

Answer

Describes the force acting on an object

Answer

Is a measure of the energy stored in an object

Question 38

In a collision between two objects, the total momentum of the system:

Accepted Answer

Is always conserved

Answer

May change

Answer

Increases

Answer

Decreases

Question 39

The moment of inertia of an object primarily depends on its:

Accepted Answer

Mass and distribution of mass

Answer

Velocity and acceleration

Answer

Shape and size

Answer

Density and temperature

Question 40

A 2 kg object is moving at a speed of 4 m/s. What is the object's kinetic energy?

Accepted Answer

16 J

Answer

8 J

Answer

32 J

Question 41

A roller coaster car is at the top of a hill. Ignoring friction, which of the following statements is true about its potential and kinetic energy?

Accepted Answer

The car has maximum potential energy and minimum kinetic energy at the top.

Answer

The car has minimum potential energy and maximum kinetic energy at the top.

Answer

The car has equal potential and kinetic energy at the top.

Question 42

Two objects of different masses are dropped from the same height. Which object will reach the ground first?

Accepted Answer

They will reach the ground at the same time.

Answer

The heavier object will reach the ground first.

Answer

It depends on the air resistance.

Answer

The lighter object will reach the ground first.

Question 43

A 10 kg object is moving at a constant velocity of 5 m/s. What is the net force acting on the object?

Accepted Answer

0 N

Answer

50 N

Answer

10 N

Question 44

Which concept falls outside the core principles of dynamics?

Accepted Answer

Statics

Answer

Momentum

Answer

Kinematics

Answer

Kinetics

Question 45

What is the standard international unit for measuring force?

Accepted Answer

Newton (N)

Answer

Second (s)

Answer

Meter (m)

Answer

Kilogram (kg)

Question 46

Which of Newton's laws postulates that an object at rest stays at rest unless acted upon by an external, unbalanced force?

Accepted Answer

First Law of Motion

Answer

Second Law of Motion

Answer

Law of Universal Gravitation

Answer

Third Law of Motion

Question 47

Which of these quantities is considered a scalar quantity?

Accepted Answer

Speed

Answer

Acceleration

Answer

Velocity

Answer

Force

Question 48

What is the generally accepted value for acceleration due to gravity on Earth?

Accepted Answer

9.8 m/s²

Answer

10 m/s²

Answer

9.8 km/s²

Answer

9.8 N/kg

Question 49

In physics, work done by a force can be defined as:

Accepted Answer

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

Answer

The product of the force and the velocity of the object.

Answer

The product of the force and the acceleration of the object.

Answer

The sum of the force and the displacement of the object.

Question 50

A car travels at a constant speed of 60 miles per hour.  What type of motion is this?

Accepted Answer

Uniform motion

Answer

Rest

Answer

Accelerated motion

Answer

Non-uniform motion

Question 51

A ball is thrown straight up into the air. At its highest point, what is its velocity?

Accepted Answer

Zero

Answer

Negative

Answer

Maximum

Answer

Equal to the initial velocity

Question 52

Which of the following is NOT a unit of acceleration?

Accepted Answer

m/s

Answer

m/s²

Answer

ft/s²

Answer

cm/s²

Question 53

A 10 kg object experiences a force of 50 Newtons. What is the object's acceleration?

Accepted Answer

5 m/s²

Answer

0.2 m/s²

Answer

10 m/s²

Answer

25 m/s²

Question 54

A car traveling at 20 meters per second comes to a stop in 5 seconds. Calculate its average deceleration.

Accepted Answer

4 m/s²

Answer

0.4 m/s²

Answer

2 m/s²

Answer

10 m/s²

Question 55

A 5 kg object is lifted vertically at a constant speed of 2 m/s. What is the work done by the lifting force over 3 seconds?

Accepted Answer

300 J

Answer

60 J

Answer

150 J

Answer

100 J

Question 56

A ball is dropped from a height of 10 meters. What is its velocity just before it hits the ground? (Assume no air resistance)

Accepted Answer

14 m/s

Answer

4.9 m/s

Answer

10 m/s

Answer

9.8 m/s

Question 57

A 10 kg object is moving at a constant velocity of 5 m/s. What is its momentum?

Accepted Answer

50 kg m/s

Answer

10 kg m/s

Answer

2 kg m/s

Question 58

Which of the following is a scalar quantity?

Accepted Answer

Speed

Answer

Displacement

Answer

Acceleration

Answer

Velocity

Question 59

A force of 20 N acts on a 5 kg object for 3 seconds. What is the change in momentum of the object?

Accepted Answer

60 kg m/s

Answer

10 kg m/s

Answer

30 kg m/s

Answer

15 kg m/s