Physics ยท Science General

Newtonian Mechanics and Forces

1,605 Questions

Newtonian mechanics studies the motion of objects and the physical laws governing them. This hub covers friction, gravitational force, inertia, and vector quantities. Mastering these fundamental physics concepts is essential for various government competitive exams.

Laws of motionFriction and inertiaVector and scalar quantitiesGravitational accelerationArchimedes principle

Newtonian Mechanics and Forces Questions

Multiple choice

What is the effect of moving the CG higher on a ship's stability?

  1. It increases the ship's stability

  2. It decreases the ship's stability

  3. It has no effect on the ship's stability

  4. It depends on the loading condition
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Moving the CG higher decreases the GM, which in turn decreases the ship's initial stability.

Multiple choice

What is the effect of adding weight to a ship on its stability?

  1. It increases the ship's stability

  2. It decreases the ship's stability

  3. It has no effect on the ship's stability

  4. It depends on the location of the added weight
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Adding weight to a ship can increase or decrease its stability, depending on the location of the added weight. Adding weight high up on the ship will decrease its stability, while adding weight low down will increase its stability.

Multiple choice

What is the name of the mathematical concept that refers to the rate of change of a function?

  1. Derivative

  2. Integral

  3. Limit

  4. Function
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The derivative of a function is the rate of change of the function with respect to its independent variable.

Multiple choice

What is the primary force that propels a kitesurfer across the water?

  1. Wind

  2. Waves

  3. Current

  4. Muscle Power
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Kite surfing relies on the power of the wind to generate lift and propel the rider across the water.

Multiple choice

Which factor is most critical in determining the stability of a ship?

  1. The ship's weight

  2. The ship's shape

  3. The ship's center of gravity

  4. The ship's displacement
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ship's center of gravity is the most critical factor in determining its stability, as it affects the ship's ability to resist tipping over.

Multiple choice

Which of these is a vector quantity in physics?

  1. Mass

  2. Temperature

  3. Velocity

  4. Density
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Velocity is a vector quantity because it has both magnitude (speed) and direction.

Multiple choice

Which of the following is a property of a structure that affects its dynamic behavior?

  1. Mass

  2. Stiffness

  3. Damping

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The dynamic behavior of a structure is influenced by its mass, stiffness, and damping properties.

Multiple choice

What is the primary cause of structural vibrations?

  1. External forces

  2. Internal forces

  3. Both external and internal forces

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Structural vibrations can be caused by both external forces (e.g., wind, earthquakes) and internal forces (e.g., thermal expansion, material imperfections).

Multiple choice

In engineering, what is the term used for the angle between a force and the horizontal?

  1. Angle of attack

  2. Angle of incidence

  3. Angle of elevation

  4. Angle of depression
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In engineering, the angle between a force and the horizontal is called the angle of attack.

Multiple choice

Which of the following is a scalar quantity?

  1. Velocity

  2. Acceleration

  3. Displacement

  4. Force
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Displacement is a scalar quantity as it has only magnitude and no direction.

Multiple choice

According to Newton's First Law of Motion, an object at rest will remain at rest, and an object in motion will continue moving with the same velocity, unless acted upon by an external force.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Newton's First Law of Motion, also known as the law of inertia, states that an object's state of motion will not change unless an external force is applied to it.

Multiple choice

The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the object's mass.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This relationship is mathematically expressed by Newton's Second Law of Motion: F = ma, where F is the net force, m is the mass of the object, and a is the acceleration.

Multiple choice

The motion of an object can be described by its position, velocity, and acceleration.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Position, velocity, and acceleration are the three fundamental kinematic quantities used to describe the motion of an object.

Multiple choice

Friction is a force that opposes the relative motion of two surfaces in contact.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Friction is a force that arises due to the interaction of microscopic irregularities on the surfaces of two objects in contact.

Multiple choice

Rolling friction is generally less than sliding friction.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rolling friction involves the motion of a round object over a surface, while sliding friction involves the motion of one solid surface over another. Rolling friction is typically less because it involves less deformation of the surfaces.