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

Which of the following is true about free fall?

  1. Object falls under the influence of gravity.

  2. Fall of parachute towards Earth.

  3. Free fall is independent of the mass of object falling.

  4. Option 1 and 2.

  5. Option 1 and 3.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, it is correct as both 1 and 3 are true.

Multiple choice

A body will continue in a state of rest, or uniform motion in a _______, unless an external force acts on it.

  1. circular path

  2. straight line

  3. axis

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

Newton's first law of inertia states that an object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced external force. The motion must be uniform (constant velocity) in a straight line.

Multiple choice

When a horse starts suddenly, the rider falls backwards. Which of the following reasons is true for this reaction?

  1. Due to the inertia of rest of the upper part of the rider's body

  2. Due to the inertia of rest of the upper part of the horse's body

  3. Due to the inertia of rest of the lower part of the rider's body

  4. Due to the inertia of rest of the lower part of the horse's body

  5. Due to the backward push of the air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

.

Multiple choice

Which of the following statements is/are incorrect for energy?

(i) Energy is destroyed due to frictional forces. (ii) Energy is the measure of the ability to do work. (iii) Energy and power both measure the same quantity.

  1. Only (i)

  2. Only (ii)

  3. Only (i) and (ii)

  4. Only (i) and (iii)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Statement (i) is incorrect. According to law of conservation of energy, ‘Energy can neither be created nor destroyed’. Statement (ii) is correct. Energy is defined as the ability to do work. Statement (iii) is also incorrect. Energy measures the ability to do work, while ‘power’ is the time rate at which work is done or energy is transferred.