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A hot-air balloon is ascending at the rate of 14 m/s and is 57 m above the ground when a package is dropped over the side. (a) How long does the package take to reach the ground? (b) With what speed does it hit the ground?
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Question: A stationary police car emits a sound of frequency 1215 Hz that bounces off of a car on the highway and returns with a frequency of 1280Hz . The police car is right next to the highway, so the moving car is tra ...
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An object falls because of gravity at a rate of -980 cm/s2 (- sign is indicative of a downward direction) for 10. seconds. If it starts from rest (vo = 0) and its position starts from do= 0.0, where is it 10. seconds lat ...
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Question: Your physics textbook is sliding to the right across the table. Part A Identify all forces acting on the object and draw a free-body diagram. Draw the vectors starting at the black dot. The location and orienta ...
A puck is moving on an air hockey table. Relative to an x, y coordinate system at time t = 0 s, the x components of the puck's initial velocity and acceleration are v0x = +7.8 m/s and ax = +5.3 m/s2. The y components of ...
An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the ...
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