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PHYS 111 Study Guide - Net Force, Deep Space 1, Buoyancy

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School
Iowa State University
Department
Physics
Course
PHYS 111
Professor
All

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Document Summary

Chapter 2: q12: a ball is dropped from rest from the top of a building and strikes the ground with a speed vf. From ground level, a second ball is thrown straight upward at the same instant that the first ball is dropped. The initial speed of the second ball is vo = vf, the same speed with which the first ball will eventually strike the ground. Ignoring air resistance, decide whether the balls cross paths at half the high of the building, above the halfway point, or below the halfway point. P38: in preparation for this problem, review conceptual example 7. From the top of a cliff, a person uses a slingshot to fire a pebble straight downward, which is the negative direction. P51: a log is floating on swiftly moving water. A stone is dropped from rest from a 75-m-igh bridge and lands on the log as it passes under the bridge.

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Physics: Principles with Applications
7th Edition, 2013
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ISBN: 9780321625922

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Related Questions

A jogger accelerates from rest to 3.0 m/s in 2.0 s. A car accelerates from 38.0 to 41.0 m/s also in 2.0 s. (a) Find the acceleration (magnitude only) of the jogger. (b) Determine the acceleration (magnitude only) of the car. (c) Does the car travel farther than the jogger during the 2.0 s? If so, how much farther?

A ball is dropped from rest from the top of a building and strikes the ground with speed v sub f. From ground level, a second ball is thrown straight upward at the same instant that the first ball is dropped. The initial speed of the second ball is v sub o equals v sub f, the same speed at which the ball will eventually strike the ground. Ignoring air resistance, decide whether the balls cross paths at half the height of the building, above the halfway point, or below the halfway point. Give reasoning.

Is there anybody could answer these two questions?

1.n object moves at a constant velocity of 5.5 m/s to
the southwest for an interval of 20 s. Halfway through
this interval, what is the magnitude of its instantaneous
velocity?

1. 11 m/s
2. It can be any value from 0 to 22 m/s.
3. More information is needed.
4. 5.5 m/s

2.A student throws a heavy red ball horizontally from
a balcony of a tall building with an initial speed v0.
At the same time, a second student drops a lighter blue
ball from the same balcony. Neglecting air resistance
, which statement is true?

1. The balls reach the ground at the same instant.
2. The blue ball reaches the ground first.
3. The red ball reaches the ground first.
4. Both balls hit the ground with the same speed.

thanks a lot in advance:)