a ball of mass m is swung in a vertical circle with a constant tangential speed. figure 1 shows the forces exerted on the ball at the top of the circle, and figure 2 shows the forces exerted on the ball at the bottom of the circle. which of the following is an expression for the centripetal acceleration of the ball in terms of m, t1, t2, and any fundamental constants?

Which of the following ideas did greek philosopher democritus contribute to the atomic theory? a. each object is made up of one atom, which varies in size from very small to very large. b. matter is composed of only one kind of particle, which can be easily destroyed. c. every element has a specific type of atom, which remains the same size in all forms of matter. d. all matter is composed of small particles, which combine to make larger objects.