Physics · Science General

Newtonian Mechanics and Forces

1,559 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 rotational equilibrium option b: engineering physics motion of system of particles and rigid bodies equilibrium physics

In a stable equilibrium, the line of action of weight of the object lies _____ the base area of the object

  1. Inside

  2. outside

  3. cant say

  4. can be both
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

For an object to be in stable equilibrium, its center of gravity must be positioned such that the vertical line passing through it falls within the base of support.

Multiple choice physics gravitational fields representing a gravitational field gravitational field circular motion and gravitation

Under the force of gravity, a heavy body falls quicker than a light body (neglect air resistance).

  1. True

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

According to newton's laws the time taken to fall is not related to mass

$S=ut+\dfrac { 1 }{ 2 } { at }^{ 2 }$
${ V }^{ 2 }-{ u }^{ 2 }=2as$
It have not to do anything with mass so both lighter and heavier body will taken same time to fall from certain point.

Multiple choice force and torque on a current carrying rectangular loop in a uniform magnetic field torque on current carrying loop force on current carrying conductor magnetic effects of current and magnetism physics

If the net force acting on the loop is zero then : 

  1. no torque acts on loop

  2. loop performs translational motion

  3. torque can act on the loop if lines of force do not coincide

  4. both a) and b)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If the net force acting on the loop is zero then, 


1) The loop performs rotational motion.


2) No torque acts on the loop.

The correct option is A.

Multiple choice zoology energy flow in an ecosystem the energy pyramid ecological pyramid ecological pyramids

The energy pyramid is always _________-.

  1. Upright

  2. Inverse

  3. Horizontal

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

The flow of energy is always unidirectional. The energy passes from primary producers to primary consumers. From primary consumer the energy passed to secondary consumers and then to teritary consumers. Thus the energy pyramid is always upright.

Multiple choice

The lift force generated by an airfoil is primarily due to:

  1. Pressure difference between the upper and lower surfaces.

  2. Viscosity of the fluid.

  3. Surface tension of the fluid.

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

The lift force generated by an airfoil is primarily due to the pressure difference between the upper and lower surfaces of the airfoil.

Multiple choice

What is the phenomenon of length contraction?

  1. Objects contract in length when moving.

  2. Objects expand in length when moving.

  3. Objects remain the same length when moving.

  4. Length is an illusion.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Length contraction is another consequence of special relativity, stating that objects moving relative to an observer contract in length.

Multiple choice

The pressure exerted by a fluid at a given point is known as:

  1. Gauge Pressure

  2. Absolute Pressure

  3. Atmospheric Pressure

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

Absolute pressure is the sum of gauge pressure and atmospheric pressure.

Multiple choice

Which force causes objects to float or sink in a fluid?

  1. Gravitational Force

  2. Buoyant Force

  3. Drag Force

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

Buoyant force is the upward force exerted by a fluid on an object immersed in it, counteracting the force of gravity.

Multiple choice

The phenomenon where a fluid exerts a force on an object moving through it is known as:

  1. Drag Force

  2. Lift Force

  3. Magnus Effect

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

Drag force is the resistance experienced by an object moving through a fluid due to its viscosity.

Multiple choice

What is the scientific principle behind the headspin move?

  1. Conservation of angular momentum

  2. Newton's first law of motion

  3. Newton's second law of motion

  4. Newton's third law of motion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The headspin move is possible due to the conservation of angular momentum. As the dancer spins their head, their body moves in the opposite direction to conserve the total angular momentum of the system.

Multiple choice

What is the scientific principle behind the power move known as the windmill?

  1. Centrifugal force

  2. Coriolis effect

  3. Gravity

  4. Newton's third law of motion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The windmill move is made possible by centrifugal force. As the dancer spins their body, the centrifugal force pushes their limbs outward, creating the illusion of a windmill.

Multiple choice

What is the scientific principle behind the breakdancing move known as the freeze?

  1. Conservation of energy

  2. Friction

  3. Gravity

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

The freeze move is made possible by the conservation of energy. As the dancer transitions from a moving state to a stationary state, their kinetic energy is converted into potential energy.

Multiple choice

What is the scientific principle behind the breakdancing move known as the air flare?

  1. Centrifugal force

  2. Coriolis effect

  3. Gravity

  4. Newton's third law of motion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The air flare is a breakdancing move where the dancer jumps into the air and performs a series of spins before landing. The move is made possible by gravity, which pulls the dancer back down to the ground.

Multiple choice

What is the scientific principle behind the breakdancing move known as the swipe?

  1. Centrifugal force

  2. Coriolis effect

  3. Friction

  4. Newton's third law of motion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The swipe is a breakdancing move where the dancer slides their feet across the floor to create a spinning motion. The move is made possible by friction, which provides the necessary force to propel the dancer.