{"type":"video","version":"1.0","html":"<iframe src=\"https://www.loom.com/embed/a422d3da5e1e4fdbbd52bea76e3eff89\" frameborder=\"0\" width=\"960\" height=\"720\" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>","height":720,"width":960,"provider_name":"Loom","provider_url":"https://www.loom.com","thumbnail_height":720,"thumbnail_width":960,"thumbnail_url":"https://cdn.loom.com/sessions/thumbnails/a422d3da5e1e4fdbbd52bea76e3eff89-00001.jpg","duration":267,"title":"SAT march 2020_S3_Q14","description":"p: L=S√1-v^2/c^2\nWhen the speed of an object approaches the speed of light, its length as seen by an observer changes. When the object is stationary relative to an observer, its length is S, and when the same object is moving at a speed of v  relative to the observer, its length is L. The formula above expresses L in terms of S, v, and c, the speed of light. Which of the following gives the speed of the object in terms of the other quantities?"}