New Class-11 Physics | Chapter 11 | Frame of reference | Physics Pulse | Muhammad Sajid

In physics, a frame of reference is a coordinate system (like X, Y, Z axes) and a set of reference points used by an observer to measure the position, velocity, and other properties of objects, defining what's "stationary" versus "moving" from their perspective. Different observers in different frames (e.g., on a train vs. on a platform) will see the same event differently, but physical laws remain consistent within inertial (non-accelerating) frames. Key Concepts Perspective: It's your viewpoint for observing motion; choosing a frame means designating something as still. Coordinates: It provides an abstract system (origin, axes) for assigning numerical values to locations. Relative Motion: Motion is always described relative to a chosen frame (e.g., a ball's parabolic path seen from the ground vs. straight up/down from a train). Examples The Earth: Often used as a common frame, even though it moves, with stars providing an external reference. A Moving Train: A passenger sees objects inside the train as stationary, while an outside observer sees them moving with the train. A Car: To the driver, other cars pass, but to a pedestrian, both cars move forward. #relativity #einstein #frame_of_reference #inertial #noninertial #theory #quatumphysics #pauli #dirac #particle_physics #sajid #wattoo #atom #historyofatom #physics #1styear #11thclass #newbookptb #sahiwalboard #guesspaper2025 #sahiwalboard #importantShortQuestions #baluchistamBoard #LahoreBoard #ptbNewSyllabus #9thPhysics #10thPhysics #Mcqs #exerciseShortQuestions #NewSyllabus2025 #physicsPulse #MuhammadSajidPhysics #SajidWattooPhysics #PhysicsWallah #alliedSchoolLecture #BeaconHouseSchool #CitySchool #grammerSchool #sahiwalboard #importantphysics #aphadecay #betadecay #gammadecay #excitedstate #nuceartransmutation #radiation #alpha #beta #gamma #chapter12 #shortQuestions #newphysics_Exercise #ch12 #fundamentalparticles #quarks #laptons #leptons #hadrons #baryons #mesons #gluons #gravitons #bosons #fermions