Physics · 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 softskills leadership

declivity

  1. downward slope

  2. unit of weight for precious stones

  3. not identical on both sides of a dividing central line

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

Declivity means a downward slope or incline. The other options describe a weight unit (B), asymmetry (C), and resemblance (D).

Multiple choice softskills communication

The metric system is deliberately designed to be simple arithmetically yet capable of _______ expansion as it becomes necessary to __________ new units of measure.

  1. confusing...record

  2. mathematical...memorize

  3. rigid...discard

  4. indefinite..invent

  5. limited...correct
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The metric system needs to be able to grow endlessly as science advances. 'Indefinite' means unlimited or without end - perfect for a system that must keep expanding. 'Invent' matches creating new units when needed. The other options don't fit: confusing (contradicts 'simple'), mathematical (doesn't imply expansion), rigid (opposite of flexible), limited (contradicts the need for growth), record/discard/correct don't match creating new measurements.

Multiple choice softskills communication

The metric system is deliberately designed to be simple arithmetically yet capable of _______ expansion as it becomes necessary to __________ new units of measure.

  1. confusing...record

  2. mathematical...memorize

  3. rigid...discard

  4. indefinite..invent

  5. limited...correct
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is a duplicate of question 125530. The metric system needs to be able to grow endlessly as science advances. 'Indefinite' means unlimited or without end - perfect for a system that must keep expanding. 'Invent' matches creating new units when needed. The other options don't fit: confusing (contradicts 'simple'), mathematical (doesn't imply expansion), rigid (opposite of flexible), limited (contradicts the need for growth), record/discard/correct don't match creating new measurements.

Multiple choice technology

FERRANTI EFFECT USUALLY OCCURS WHEN THE LINE IS ??

  1. FULLY LOADED

  2. LIGHTLY LOADED

  3. HALF LOADED

  4. OVER LOADED
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Ferranti effect is the rise in voltage at the receiving end of a lightly loaded transmission line due to the capacitive charging current dominating over inductive voltage drop. This happens when the line is long and lightly loaded because the shunt capacitance causes leading current that charges the line. Under heavy loading, the inductive effect dominates and voltage drops.

Multiple choice technology

In thermodynamics----------analogous to the free bodydiagram to which we apply the laws of mechanics, (i.e.Newton’s Laws of Motion).

  1. Surrounding

  2. System

  3. Boundary

  4. Properties
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In thermodynamics, a System is defined as the specific portion of matter or region of space chosen for analysis, analogous to a free body diagram in mechanics. The system is bounded by surfaces through which energy and mass can cross.

Multiple choice

In Lewinian theory, what is the name given to the forces that propel individuals within their life spaces?

  1. Balances

  2. People magnets

  3. Life events

  4. Valences
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In Lewin's field theory, valences are the positive or negative forces (attractive or repulsive) that propel individuals toward or away from goals within their life space. These psychological forces create motivation. Life events are external occurrences, people magnets is not Lewinian terminology, and balances refers to equilibrium states.

Multiple choice

Which of the following is not an example to prove that moving air exerts pressure?

a. When one flies a kite, the air is always blowing from the direction in which one's back is facing. b. While riding a bicycle, if the wind is blowing opposite to the direction of bicycle, it is easier to drive. c. While rowing a sail boat, it is always easier to row it in the direction of wind.

  1. Only a

  2. Both a and b

  3. Only b

  4. Both b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this is not an example to prove that moving air exerts pressure. While riding a bicycle, if the wind is blowing opposite to the direction of bicycle, it is difficult to drive. It is because the moving air from the opposite direction exerts a good amount of pressure.

Multiple choice

What happens if a stream of air is blown through a tube under one of the pans of a physical balance in equilibrium?

  1. The pan will go up

  2. The pan will not be affected

  3. The pan will go down

  4. The pan will oscillate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When air is blown through a tube under a pan of a physical balance, the increased velocity of air creates lower pressure (Bernoulli's principle). This pressure difference pushes the pan downward. The pan doesn't go up or oscillate - it experiences a net downward force.

Multiple choice

What is the passage about?

Directions: Read the following passage and answer the question.
Since tires are the contact point of a vehicle with the road, they provide a lot of inputs about the road surface. They are also the final execution point of the driver’s commands to the vehicle. Tire characteristics, not surprisingly, are a hot point of discussion for tire and vehicle manufacturers. The tires are connected to various linkages like springs, dampers, suspension systems and drive train to provide stability and surface adhesion. Not only that, they provide feedback to the driver about directional movement and also about the various forces acting upon the vehicle at a point in time. The forces can range from centrifugal force of going around a sharp curve at high speed, or the level of traction being maintained at that point in time. The suspension of a vehicle, the next link in the chain, is designed to allow the wheels to meet the ever changing requirements of the surface conditions and the other external conjoined factors but, due to a host of other considerations both directly related to the vehicle and otherwise, the end results are often less than ideal. Other influencing factors include body vibration, engine and body noise levels, and side-to-side sway. Upon going over a bump, the un-damped suspension of a vehicle will experience a series of oscillations that will play out according to the natural frequency of the system. Irrespective of however much the noise levels and the vibrations transmitted from the engine, moving parts, wind resistance and the feedback from the surface are damped, the natural frequency of the frame of the vehicle will stay in play.

  1. Relation and role of tires with respect to road conditions.

  2. Role of suspension in the handling of a vehicle.

  3. Various factors that influence noise levels in a moving vehicle.

  4. Interplay of various factors in determining ride quality of a vehicle.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct; all the factors come together to define the overall ride experience.

Multiple choice

The passage suggests which of the following about vehicle control? I. Speed and direction of a moving vehicle determine the ride quality. II. Change in centre of gravity resulting from centrifugal force is one of key determinants of road holding abilities. III. Proper dampening can totally eliminate unpleasant vibrations.

Directions: Read the following passage and answer the question.
Since tires are the contact point of a vehicle with the road, they provide a lot of inputs about the road surface. They are also the final execution point of the driver’s commands to the vehicle. Tire characteristics, not surprisingly, are a hot point of discussion for tire and vehicle manufacturers. The tires are connected to various linkages like springs, dampers, suspension systems and drive train to provide stability and surface adhesion. Not only that, they provide feedback to the driver about directional movement and also about the various forces acting upon the vehicle at a point in time. The forces can range from centrifugal force of going around a sharp curve at high speed, or the level of traction being maintained at that point in time. The suspension of a vehicle, the next link in the chain, is designed to allow the wheels to meet the ever changing requirements of the surface conditions and the other external conjoined factors but, due to a host of other considerations both directly related to the vehicle and otherwise, the end results are often less than ideal. Other influencing factors include body vibration, engine and body noise levels, and side-to-side sway. Upon going over a bump, the un-damped suspension of a vehicle will experience a series of oscillations that will play out according to the natural frequency of the system. Irrespective of however much the noise levels and the vibrations transmitted from the engine, moving parts, wind resistance and the feedback from the surface are damped, the natural frequency of the frame of the vehicle will stay in play.

  1. Both I & II

  2. Both II & III

  3. Only I

  4. Only II

  5. Only III
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct; centrifugal force that comes in play on curves is one of key components of road holding abilities.

Multiple choice

Match List I with List II and select the correct answer using the codes given below the Lists: List I List II (Physical Phenomenon) (Associated Physical property) (a) Rolling motion 1. Surface tension (b) Soap bubble 2. Gravitation (c) Bending of beams 3. Elasticity (d) Satellite motion 4. Moment of inertia Codes :

  1. (a) 4 (b) 1 (c) 3 (d) 2

  2. (a) 4 (b) 2 (c) 1 (d) 3

  3. (a) 3 (b) 1 (c) 4 (d) 2

  4. (a) 2 (b) 1 (c) 3 (d) 4
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Rolling motion depends on moment of inertia (4) which resists rotational acceleration. Soap bubbles form due to surface tension (1) minimizing surface area. Bending of beams relates to elasticity (3) - material's ability to return to original shape. Satellite motion is governed by gravitation (2). Option A correctly matches all phenomena.