A ball is thrown with an initial velocity of U = (51+ m/s. When it reaches the top of

its trajectory, neglecting air resistance, what is its (2 point each).

a) Velocity?

b) Acceleration?​

Oxygen and nutrients are moved through the body by the: a. circulatory system c. lymphatic system b. digestive system d. reproductive system

Suppose a wheel with a tire mounted on it is rotating at the constant rate of 2.15 times a second. a tack is stuck in the tire at a distance of 0.373 m from the rotation axis. noting that for every rotation the tack travels one circumference (a) find the tack's tangential speed. (b) what is the tacks radial acceleration?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?