Timmy and Billy are using a ramp to load furniture into a truck. While rolling a 220-pound piano up the ramp, they discover that the truck is too full with other furniture for the piano to fit. Billy holds the piano in place on the ramp while Timmy repositions other items to make room for it in the truck. If the angle of inclination of the ramp is 25°, how many pounds of force must Billy exert to hold the piano in position? Billy must exert pounds of force. (Type an integer or decimal rounded to one decimal place as needed.) 25° 220 lb

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!