Homopolar foil Explain what's happening in each demonstration using your knowledge of electromagnets

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Two polarizers are oriented at 24.0∘ to one another. light polarized at a 12.0-degree angle to each polarizer passes through both. what is the transmitted intensity (%)?

14. a body is projected with velocity vi from a. at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2÷v1is