5. (1.5 points) A 180 pound person carries a 25 pound can of paint up a helical staircase that encircles a tower with a radius of 20 feet. The tower is 90 feet high and makes exactly three complete revolutions. If there is a hole in the can of paint and 9 pounds of paint leaks steadily out of the can during the person’s ascent, how much work is done by the person against gravity in climbing the stairs?

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

Why is the use of carbon-14 limited