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 physics force and newton's laws of motion concept of inertia galileo's law and inertia mass and inertia

Which of the following statement is true when a magician pulls a tablecloth from under a table full of dishes without disturbing the dishes?

  1. Gravity holds the dishes still

  2. The weight of the dishes is reduced

  3. Action-reaction forces are in operation

  4. The dishes have inertia

  5. The dishes have no acceleration
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The dishes have the inertia at rest, thus they tend to remain at rest even when the tablecloth is pulled of suddenly from the table and hence the dishes do not get disturbed.

Multiple choice physics force and newton's laws of motion concept of inertia galileo's law and inertia mass and inertia

Passengers standing in a bus are thrown outwards when the bus takes a sudden turn. This is due to:

  1. outward pull on them

  2. inertia

  3. change in momentum

  4. change in acceleration
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Newton's I law of inertia states that an object will change its direction when a force is applied to it. Hence, when a bus takes a sudden turn the passengers are thrown outward. This is due to the inertia of direction.

Multiple choice physics dynamics - explaining motion concept of inertia galileo's law and inertia mass and inertia

Galilee's law of inertia is another name for newton's (... ) law of motion.

  1. First

  2. Second

  3. Third

  4. Anyone of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Galileo's law of inertia is another name for newton's First law of motion. Newton's first law states that an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force. Inertia comes from mass. Objects with more mass have more inertia.

Multiple choice physics dynamics - explaining motion concept of inertia galileo's law and inertia mass and inertia

What is the other name of Galileo's law of falling bodies?

  1. Law of motion

  2. Newton's first law

  3. Newton's second law

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

Galelio’s hypothesis stated,”A falling body accelerates uniformly: it picks up equal amounts of speed in equal time intervals, so that, if it falls from rest, it is moving twice as fast after two seconds as it was moving after one second, and moving three times as fast after three seconds as it was after one second.”


Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

Centrifugation is a process which involves the application of the :

  1. centripetal force

  2. gravitational force

  3. friction

  4. none of above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Centrifugation is a process which involves the application of the centripetal force for the sedimentation of heterogeneous mixtures with a centrifuge, and is used in industrial and laboratory settings.

Multiple choice bio-chemistry biochemical techniques centrifugation separation techniques separation of matter

What forces out the water from fabric in washing machine?

  1. Magnetic force

  2. Frictional force

  3. Force of attraction

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

Centrifugation is a process used to separate or concentrate materials suspended in a liquid medium. When you wash clothes in a washing machine, it is the centrifugal force generated in the "spin" cycle that forces water out of the fabric to facilitate faster drying.

Multiple choice physics free, damped and forced oscillations resonance: examples and uses resonance oscillatory motion

Imagine a child sitting on a swing in a park and the child's mother is pushing the swing from the back. The mother maintains the same tempo as the motion of the swing. If the mother tries to push at a faster tempo, the arc of the swing will:

  1. increase

  2. decrease

  3. remain the same

  4. become zero, i.e., the swing will stop
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As the mother maintains the same tempo as the motion of the swing, it means frequency of mother and the swing is same, there is resonance. When mother tries to push at a faster tempo, frequency of mother changes and resonance is disturbed due to which, the arc of swing (amplitude) decreases.

Multiple choice physics sound sound is produced by a vibrating body propagation of sound production and propagation of sound

A to and fro motion by an object is also called 

  1. periodic motion

  2. oscillatory motion

  3. cyclic motion

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

    Periodic motion is defined as the motion which is repeated identically after a fixed interval of time , to and fro motion is not necessary here .

    Oscillatory motion is that motion in which body moves to and fro about a fixed point in a fixed interval of time .
    In a cyclic motion , body returns at its initial position after a time .

Multiple choice geography rivers, coasts and glaciation landforms created by wind erosion wind and coast denudation river landform

What are the types of mass movements?

  1. Rapid on steeper slopes

  2. Slower of gentle slopes

  3. Both A and B

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

When weathered particles move down due to gravity alone, the process is called mass movement. Mass movement occur in two ways; it is rapid on sleeper slopes while it is slower on gentle slopes.

Multiple choice biology absorption by roots - the processes involved root pressure transportation in plants factors affecting the transport of water and minerals in plants

Root pressure is a _______

  1. Pulling force

  2. Pushing force

  3. Both A and B

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Root pressure provides a force which causes pushing of water in a stem. A continuous flow of water is maintained in the plants because the leaves transpire water through stomata and to replace the lost water, the water drawn by the roots moves up.

Multiple choice physics dynamics - explaining motion system of unit summary of si units system of units

Which of the following class of forces is different from others?

  1. Pulling of a cart

  2. Stretching of a coiled spring

  3. Kicking of a football

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

Pulling of a cart, stretching of a coiled spring and kicking of a football take place due to contact forces. A contact force is any force that requires contact to occur. But electrical force is a non contact force which acts on an object without coming physically in contact.

Multiple choice physics a little effort, lot of work motion in application common machines introduction to simple machines

A simple machine :

  1. magnifies the movement only

  2. enables to do more work by less effort

  3. changes the direction of force in all circumstances

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Simple machines are designed to make work easier by allowing the user to apply less force over a greater distance, effectively magnifying the input force.