HELP PLS! 5. If you attach a ball to a rope and swing it at a constant speed in a circle above your head, the ball is in a circular
motion. In which direction is it accelerating? What force causes the acceleration?

The position of a crate sliding down a ramp is given by x=(0.05t^3) m, y=(1.7t^2) m, z=(6−0.85t^5/2) m, where t is in seconds. (a) determine the magnitude of the crate's velocity when t = 2 s. (b) determine the magnitude of the crate's acceleration when t = 2 s.

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration