When you see marjorie, she is swinging a bucket of water around in a circle. the speed of the bucket of water does not change as it moves in the circle. which of the following statements best explains how you could tell that a net force is constantly acting on the bucket of water?
a. the bucket of water is not at rest.
b. the bucket of water is speeding up or slowing down.
c. the bucket of water began at rest, and you saw it begin to move.
d. the bucket of water's direction is changing, instead of moving in a straight line.

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

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.

The particles that are found in the nucleus of an atom are