Newton's laws by Paula Saulite https://padlet.com/paulama/uhtz45ebsa11 Paula SaulÄ«te en-us 2015-11-01 14:11:15 UTC 2023-01-28 10:01:14 UTC hello@padlet.com Newton's first law paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78555942 2015-11-01 14:34:53 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78555942 Newton's first law of motion is often stated as - 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 force. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556009 2015-11-01 14:36:23 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556009 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556185 2015-11-01 14:41:18 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556185 Newton's first law of motion - sometimes referred to as the law of inertia. Inertia -  the resistance an object has to a change in its state of motion. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556287 2015-11-01 14:43:43 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556287 Mass is that quantity that is solely dependent upon the inertia of an object. The more inertia that an object has, the more mass that it has. A more massive object has a greater tendency to resist changes in its state of motion. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556326 2015-11-01 14:44:44 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556326 Example: Imagine a place in the cosmos far from all gravitational and frictional influences. Suppose that you visit that place (just suppose) and throw a rock. The rock will                                                                                             a. gradually stop.                                                                                                         b. continue in motion in the same direction at constant speed. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556498 2015-11-01 14:48:24 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556498 Answer : According to Newton's first law, the rock will continue in motion in the same direction at constant speed. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556529 2015-11-01 14:49:08 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556529 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556629 2015-11-01 14:51:56 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556629 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556658 2015-11-01 14:52:47 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556658 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556675 2015-11-01 14:53:13 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556675 Some animations and simulations: paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556735 2015-11-01 14:54:45 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556735 https://phet.colorado.edu/sims/html/forces-and-motion-basics/latest/forces-and-motion-basics_en.html paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556762 2015-11-01 14:55:31 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556762 Newton's second law paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556867 2015-11-01 14:58:10 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556867 The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78556947 2015-11-01 15:00:13 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78556947 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557065 2015-11-01 15:03:35 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557065 Newton's second law of motion can be formally stated as follows - The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557088 2015-11-01 15:04:11 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557088 a = F/ m (m/s2) paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557106 2015-11-01 15:04:43 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557106 F=ma (N) paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557126 2015-11-01 15:05:12 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557126 Example:  Determine the accelerations that result when a 12-N net force is applied to a 3-kg object and then to a 6-kg object. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557150 2015-11-01 15:05:47 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557150 Answer : A 3-kg object experiences an acceleration of 4 m/s2. A 6-kg object experiences an acceleration of 2 m/s2 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557191 2015-11-01 15:06:41 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557191 Some animations and simulations: paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557219 2015-11-01 15:07:24 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557219 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557290 2015-11-01 15:08:52 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557290 https://phet.colorado.edu/en/simulation/forces-1d paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557513 2015-11-01 15:12:58 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557513 https://www.classzone.com/books/ml_science_share/vis_sim/mfm05_pg50_newton/mfm05_pg50_newton.html paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557589 2015-11-01 15:14:11 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557589 Newton's third law paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557609 2015-11-01 15:14:33 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557609 F1 = - F2  paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557629 2015-11-01 15:14:55 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557629 Newton's third law is :                                                                                                            For every action, there is an equal and opposite reaction. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557691 2015-11-01 15:16:42 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557691 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557713 2015-11-01 15:17:19 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557713 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557722 2015-11-01 15:17:34 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557722 The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.  paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78557755 2015-11-01 15:18:17 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78557755 In the top picture, Kent Budgett is pulling upon a rope that is attached to a wall. In the bottom picture, Kent is pulling upon a rope that is attached to an elephant. In each case, the force scale reads 500 Newton. Kent is pulling ...                                                                                        a. with more force when the rope is attached to the wall.                                                                  b. with more force when the rope is attached to the elephant.                                                        c. the same force in each case. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78558110 2015-11-01 15:26:12 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78558110 Example: paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78558306 2015-11-01 15:30:41 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78558306 Answer : Kent is pulling with 500 N of force in each case. The rope transmits the force from Kent to the wall (or to the elephant) and vice versa. Since the force of Kent pulling on the wall and the wall pulling on Kent are action-reaction force pairs, they must have equal magnitudes. Inanimate objects such as walls can push and pull. paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78558328 2015-11-01 15:31:15 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78558328 Some animations and simulations: paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78558451 2015-11-01 15:34:42 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78558451 http://teachertech.rice.edu/Participants/louviere/Newton/law3.html paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78558527 2015-11-01 15:36:44 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78558527 https://phet.colorado.edu/sims/html/gravity-force-lab/latest/gravity-force-lab_en.html paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78558547 2015-11-01 15:37:10 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78558547 paulama https://padlet.com/paulama/uhtz45ebsa11/wish/78558562 2015-11-01 15:37:31 UTC https://padlet.com/paulama/uhtz45ebsa11/wish/78558562