Udemy
    •  
    •  
    •  
    •  
    •  
    •  
    •  
    •  
Subscribe
Turn what you know into an opportunity and reach millions around the world.
Learn More
Your cart is empty.
Keep shopping
Understanding concepts of Force and Newton Laws of Motion
Rating: 4.0 out of 5(1 rating)
3 students

Understanding concepts of Force and Newton Laws of Motion

Force, Newton first law , Inertia Newton II law , Momentum ,Newton third law , Conservation of Momentum , Friction
Created byGagan Deep Ahuja
Last updated 1/2023
English
English [Auto],

What you'll learn

  • Force definition , Galileo law , Newton first law of motion , Inertia , types of inertia , Newton second law of motion ,
  • Momentum
  • Law of conservation of momentum
  • Newton third law
  • Friction

Course content

2 sections • 27 lectures • 1h 56m total length

  • Introduction3:41

    Explore the basics of force and newton's laws of motion, from defining force to galileo's experiment, then first and second laws, momentum, impulse, and related problems.

  • Force definition3:54

    Define force as the effort that moves a resting body, stops a moving ball, changes direction, and alters shape, illustrated by football, bicycle, and balloon examples.

  • Balanced and unbalanced forces3:33

    Explore how balanced forces lead to equilibrium, keeping objects at rest or moving with constant velocity, and see how equal and opposite forces produce zero net force.

  • Galileo Experiment5:22

    Galileo shows that on inclined planes friction alters ball's height, yet with frictionless surfaces potential energy converts to kinetic energy and back, implying no force is needed to continue horizontally.

  • Newton First law of motion3:23

    explain newton's first law: a body at rest stays at rest and a body in motion remains in motion unless acted on by an external unbalanced force, illustrating inertia.

  • Inertia and its types8:52

    Define inertia as a body's resistance to change in its state, with inertia of rest and inertia of motion, illustrated by passengers in a bus and objects on a tablecloth.

  • Inertia of motion and direction8:10

    Recognize Newton's first law by describing inertia as a body's resistance to changes in motion, rest, or direction, shown by a moving bus, stopping, and luggage.

  • Momentum2:43

    Define momentum as mass times velocity, a vector in kg m/s, and show that higher momentum requires greater stopping force with bullets and trucks, linking to Newton's second law.

  • Newton 2nd Law3:56

    Explains Newton's second law by deriving force as the rate of change of momentum, F = Δp/Δt, and shows that net external force drives acceleration, F = m a.

  • Calculating change in momentum3:47

    Apply Newton's second law to calculate change in momentum as final momentum minus initial momentum, recognizing it as a vector quantity; apply to straight-line motion and collisions where direction matters.

  • Impulse3:41

    Explore how impulse links force and momentum, with impulse equaling change in momentum, and how shorter time increases force for a given impulse, shown by area under the force-time curve.

  • Example based on Newton 2nd law of motion5:24

    This video explains Newton's second law by linking force to momentum change and time interval, with examples of catching a ball, falling on different floors, and car shock absorbers.

  • Newton 3rd Law11:10

    Explore Newton's third law by examining action–reaction pairs in common scenarios, from a book on a table and gun recoil to swimming, sprinklers, walking, spring balances, rockets, and boat jumps.

  • Numerical on newton 2nd law1:59

    Apply Newton's second law to a stopping scenario: a 5 kg body moving at 1 m/s is brought to rest in 10 s, requiring a decelerating force of 0.5 N.

  • Numerical on Newton 2nd law of motion part 23:12

    Explore Newton's second law through numerical problems, linking force, mass, and acceleration, and solving for mass using F=ma and a=(v-u)/t with velocity changes.

  • Numerical on Newton 2nd law of motion part 32:40

    Convert velocity from km/h to m/s, calculate acceleration from velocity change over 5 seconds, then apply f = m a with mass 1000 kg to find the force.

  • Numerical on Nweton 2nd law of motion part 41:15

    Apply Newton's second law to compute the change in momentum for a body of mass m decelerating from velocity v to zero in one second, via final minus initial momentum.

  • Conservation of momentum8:31

    Explore the conservation of momentum in isolated systems, where internal forces preserve total momentum during collisions between bodies, with examples showing momentum before equals momentum after.

  • Recoil Velocity of Gun(Application of conservation of momentum)4:48

    Apply conservation of momentum to a gun and bullet, showing zero initial momentum and an opposite recoil velocity, V = - (m_b / M) v, from internal forces.

  • Girl Jumping on Cart (Application of Conservation of Momentum)2:56

    Use conservation of momentum to analyze a girl jumping onto a frictionless cart. Compute the common velocity of the girl-cart system from the initial momentum.

  • Bullet collides with block and both move together ( Application of conservation2:12

    Apply conservation of momentum to a bullet of mass m colliding with a stationary block of mass M; the system moves with a common velocity V = mv/(M+m).

  • Collision of two bodies moving in opposite direction ( Application of conservat4:45

    Apply conservation of momentum to two colliding bodies, 65 kg and 60 kg moving at 5 m/s and -6 m/s, to find a common velocity of about -0.28 m/s (leftward).

  • Numericals on conservation of momentum Part 12:14

    Apply conservation of momentum to a gun–bullet system: with zero initial momentum, the final momenta balance, giving the gun a recoil velocity opposite to the bullet.

  • Numericals Conservation of momentum Part 24:51

    Apply conservation of momentum to a two-object collision with masses 100 g and 200 g and initial velocities, to determine the second object's final velocity of 1.16 m/s.

Requirements

  • basic understanding of Algebra
  • Knowledge of english language

Description

In Kinematics course we described motion of an object along a straight line path in terms of its position , velocity  and acceleration . We also saw that motion is of two types uniform and non uniform. But we did not discuss what causes motion? Why does the speed of an object change with time ? Do all motion require cause ? If so then what is the nature of this cause? Answer to these critical questions we seek to answer through this course.

Newton’s laws of motion, three statements describing the relations between the forces acting on a body and the motion of the body, first formulated by English physicist and mathematician Isaac Newton, which are the foundation of classical mechanics.

Newton’s first law: the law of inertia

Newton’s first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force. In fact, in classical Newtonian mechanics, there is no important distinction between rest and uniform motion in a straight line; they may be regarded as the same state of motion seen by different observers, one moving at the same velocity as the particle and the other moving at constant velocity with respect to the particle. This postulate is known as the law of inertia.

The law of inertia was first formulated by Galileo Galilei for horizontal motion on Earth and was later generalized by René Descartes. Although the principle of inertia is the starting point and the fundamental assumption of classical mechanics, it is less than intuitively obvious to the untrained eye. In Aristotelian mechanics and in ordinary experience, objects that are not being pushed tend to come to rest. The law of inertia was deduced by Galileo from his experiments with balls rolling down inclined planes.

For Galileo, the principle of inertia was fundamental to his central scientific task: he had to explain how is it possible that if Earth is really spinning on its axis and orbiting the Sun, we do not sense that motion. The principle of inertia helps to provide the answer: since we are in motion together with Earth and our natural tendency is to retain that motion, Earth appears to us to be at rest. Thus, the principle of inertia, far from being a statement of the obvious, was once a central issue of scientific contention. By the time Newton had sorted out all the details, it was possible to accurately account for the small deviations from this picture caused by the fact that the motion of Earth’s surface is not uniform motion in a straight line (the effects of rotational motion are discussed below). In the Newtonian formulation, the common observation that bodies that are not pushed tend to come to rest is attributed to the fact that they have unbalanced forces acting on them, such as friction and air resistance.

Who this course is for:

  • Students who want to develop understanding of Newton laws of motion without involving calculus and vectors
  • Students lacking confidence in Newton laws of Motion in Physics

Report abuse