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

Pressure is the

  1. Gravitational force of earth

  2. Muscular force per unit length

  3. Force per unit area

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

Pressure is force per unit area.

Multiple choice

An object weights maximum in

  1. air

  2. water

  3. hydrogen

  4. vacuum

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Weight is the force of gravity minus the buoyant force of the surrounding medium. In a vacuum, there is no buoyant force, so the object records its true weight, which is the maximum possible.

Multiple choice

Which of the following is not an example for vector quantity?

  1. Speed

  2. Velocity

  3. Acceleration

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

A vector quantity has both magnitude and direction. Speed is a scalar quantity because it only has magnitude, whereas velocity, acceleration, and retardation (negative acceleration) are vectors.

Multiple choice

The weight of an object is due to ________________.

  1. gravitational force

  2. frictional force

  3. both gravitational and frictional forces

  4. neither gravitational nor frictional force
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Yes, it is correct as weight is a measure of the earth's gravitational pull on an object.

Multiple choice

Which of the following statements does not explain the effect of force, which is greater when area of contact is smaller?

  1. We feel pain when we hold sharpen pencil between the index fingers of both hands and pressing it hard.

  2. Hammering a nail on a wall is easier than hammering a wooden piece.

  3. A rubber band on pulling becomes longer.

  4. Cutting an apple with a sharp edge is easier.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, it is correct because this statement does not explain that the effect of force is greater when area of contact is lesser. It shows that when force is applied on an object, it changes its shape.