1. A 3­kg ball is thrown directly up into the air with an initial speed of 15 m/s. Make a table showing the time, position, velocity, acceleration, and net force for the ball in one­second intervals. Ignore air resistance and use 9.8 m/s2 for gravity.
Sep 23­12:07 PM
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2. Two stones are released from rest at a certain height, one after the other. Ignoring air resistance, will the difference in their speeds increase, decrease, or stay the same? Explain.
3. A ball is thrown straight up in the air. Ignoring air resistance, sketch graphs of position, velocity, and acceleration of the ball as a function of time. Stack these graphs vertically so that they share a common time axis. Sep 23­12:08 PM
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4. A helicopter is ascending vertically with a speed of 7.0 m/s. At a height of 140 m above the ground, a package is dropped from a window. How much time does it take for the package to reach the ground? Ignore air resistance.
Sep 23­12:11 PM
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5. A car decelerates from a speed of 50 m/s to rest in 130 meters. What is the magnitude of its acceleration?
6. A car decelerates from a speed of 40 km/h to rest in 4.7 seconds. What is the magnitude of the acceleration?
Sep 23­12:13 PM
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7. How far to the nearest meter can a sprinter running at 9 m/s, travel in the time it takes a rock to fall 39 meters? Sep 23­12:16 PM
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Sep 23­2:51 PM
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