A mountain goat was traveling down a hill at 1 m/s and then fell off a cliff and was falling at the acceleration due to gravity 9.8m/s2. What was its final velocity if it fell 54 meters to t 1. A bicyclist accelerates at 0.89 m/s2 during a 5.0-second interval. What is the change in the velocity of the bicyclist and the bicycle?

Emmy kicks a soccer ball up at an angle of 45° over a level field. she watches the ball's trajectory and notices that it lands, two seconds after being kicked, about 20 m away to the north. assume that air resistance is negligible, and plot the horizontal and vertical components of the ball's velocity as a function of time. consider only the time that the ball is in the air, after being kicked but before landing. take "north" and "up" as the positive ‑ and ‑directions, respectively, and use ≈10 m/s2 for the downward acceleration due to gravity.

Astudent weighing 700 n climbs at constant speed to the top of an 8 m vertical rope in 10 s. the average power expended by the student to overcome gravity is most nearly

Which best describes the difference between internal and thermal energy?