A runner accelerates at a rate of 3a from a velocity of 2V to 4V. Solve for: a) the time for this acceleration to occur

b) the distance traveled by the runner

What is the length x of the side of the triangle below? (hint: use the cosine function)

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90