Examples of newton's first law of motion.

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Jasmine Grover

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Newton's first law of motion, also known as the law of inertia, states that an object at rest will remain at rest and an object in motion will remain in motion with a constant velocity unless acted upon by an external force. In simpler terms, it means that objects will continue to do what they're already doing unless something else forces them to change. Inertia was explained by Sir Isaac Newton in his first law of motion.

Newtons First Law of Motion

Here are some examples that illustrate the first law of motion:

  1. A book sitting on a table: If a book is placed on a table and left undisturbed, it will remain there until someone or something moves it. The book is at rest, and according to Newton's first law, it will remain at rest until a force acts upon it.
  2. A car driving on a straight road: When a car is moving on a straight road with a constant speed, it will continue to do so until an external force acts on it, such as hitting the brakes or turning the steering wheel.
  3. A hockey puck sliding on ice: When a hockey puck is pushed on the ice, it will continue to slide until it hits something, such as the boards, another player's stick, or the goalpost. In this case, friction and air resistance will slow down the puck, but it will continue to move in a straight line until acted upon by an external force.
  4. A person jumping off a diving board: When a person jumps off a diving board, they move in a parabolic arc before hitting the water. According to Newton's first law, the person will continue to move in a straight line with a constant velocity until the force of gravity pulls them down towards the water.

Overall, Newton's first law of motion is all about inertia, the tendency of objects to resist changes in their state of motion. It helps explain why objects behave the way they do and is a fundamental principle of physics.

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CBSE CLASS XII Related Questions

  • 1.
    Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.


      • 2.
        Write two advantages of reflecting telescope over refracting telescope.


          • 3.
            Read the following paragraph and answer the questions that follow.
            In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A student slowly moves the lens away from the object towards the screen and finds that she is able to form sharp image of the object for two positions of the lens. The distance between these two positions of the lens is d.


              • 4.
                Read the following paragraph and answer the questions that follow.
                A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.


                  • 5.
                    Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?

                      • The total charge of the two spheres is conserved.
                      • Both spheres attain the same potential.
                      • The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2)}{(r_1 + r_2)}$
                      • The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2) (r_1 + r_2)}{r_1 r_2}$

                    • 6.
                      A student sets up the circuit as shown in the figure to find the value of unknown resistance X and records a set of readings of the voltmeter and the ammeter by using the rheostat.

                        CBSE CLASS XII Previous Year Papers

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