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 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.

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

A device which helps to lift heavy loads or speed up the motion or change the direction of force in the desired direction.

  1. Machine

  2. Magnets

  3. Motor

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

A machine is a device which helps us to lift heavy loads or speed up the motion or change the direction of force in the desired direction. It can be used to obtain a gain in speed or in many more actions.

Multiple choice physics oscillations and waves standing waves in strings standing waves reflection of waves

Motion that moves to and fro in regular time intervals is called _________________ motion.

  1. Vibratory

  2. Translatory

  3. Rotatory

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

Sounds are made by vibrations. Some vibrations are easy to see. The vibrations that create sound must travel through a medium, such as air or water, or anything made of molecules. With each forward motion, air molecules pulse outward, pushing other air molecules and crowding them together. With each backward motion, the molecules get less crowded. The forward and backward vibration of the glass creates a chain reaction of crowded and not-so-crowded molecules that ripples through the air. This traveling vibration is called a sound wave. 
Motion that moves to and fro in regular time intervals is called vibratory or oscillatory motion.

Multiple choice physics friction advantages and disadvantages of friction merits and demerits of friction and methods to reduce it friction: a necessary evil

The force which prevents us from slipping while walking on the road is:

  1. muscular force of our body

  2. gravitational pull by earth

  3. frictional force

  4. balanced forces of nature
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

When we push the ground with our feet, the friction provides a forward reaction to our push and sends us forward. Walking on smooth ground is difficult because the frictional force is not great enough to prevent slipping.


Option C is correct.

Multiple choice physics friction advantages and disadvantages of friction merits and demerits of friction and methods to reduce it friction: a necessary evil

In which of the following cases more friction is desirable?

  1. Movement of piston in a cylinder

  2. Braking of a vehicle

  3. Running on a track

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

Answer is B.

Brakes is a type of automotive brake that slows or stops a vehicle by converting kinetic energy into heat energy, via friction. The heat energy is then dissipated into the atmosphere. 
Hence, braking of a vehicle happens due to friction.

Multiple choice physics friction advantages and disadvantages of friction merits and demerits of friction and methods to reduce it friction: a necessary evil

You are marooned on a frictionless horizontal surface and cannot exert any horizontal force by pushing against the surface. How can you get off?

  1. By jumping

  2. By spitting or sneezing

  3. By rolling your body on the surface

  4. By running on the plane
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

We will need friction to roll or run on any surface. In our case, we have a frictionless surface. Hence, by conservation of linear momentum sneezing can make us move on that surface.