Aroller coaster car rapidly picks up speed as it rolls down a slope. as it starts down the slope, its speed is 4m/s. but 3 seconds later at the bottom of the slope its speed is 22m/s. what is its average acceleration?

The modern-day generator works on the principle of electromagnetic induction discovered by michael faraday in 1831-32. faraday discovered that the above flow of electric charges could be induced by moving an electrical conductor, such as a wire that contains electric charges, in a magnetic field.