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Physics problems about velocity, centripetal force and coefficient of static friction

A group of physics students construct a device to launch water balloons. They launch a water balloon on a level football field, with an initial velocity of 8.0 m/s at an angle 38 degree above the horizontal.

a. Find the vertical component of the initial velocity.
b. Find the horizontal component of the initial velocity.

Suppose a nickel (mass = 5.0 grams) is sitting on a turntable, 15.0 c, from the center. The turn-table is turning at 33-1/3 revolutions per minute. (figure 6 attached)
a. What is the nickel's velocity in m/s
b. Determine the centripetal force on the nickel.
c. Draw a free-body diagram of the nickel. Find the minimum value that the coefficient of static friction can be, in order that the nickel not start sliding.

Solution Summary

This solution solves for velocity, centripetal force and the coefficient of static friction, and includes a free body diagram.