A student throws a set of keys vertically upward to her sorority sister, who is in a window 2.30 m above. The second student catches the keys 2.40 s later. (a) With what initial velocity were the keys thrown? magnitude m/s --Select- direction (b) What was the velocity of the keys just before they were caught? magnitude m/s direction ---Select-

A student throws a set of keys vertically upward to her sorority sister, who is in a window 2.30 m above. The second student catches the keys 2.40 s later. (a) With what initial velocity were the keys thrown? magnitude m/s --Select- direction (b) What was the velocity of the keys just before they were caught? magnitude m/s direction ---Select-

Name: A student throws a set of keys vertically upward to her sorority sist
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Description: A student throws a set of keys vertically upward to her sorority sister, who isin a window 2.30 m above. The second student catches the keys 2.40 s later.(a) With what initial velocity were the keys thrown?magnitudem/s--Select-direction(b) What was

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter4: Motion In Two And Three Dimensions

Section: Chapter Questions

Problem 32P: A Lockheed Martin F-35 II lighting jet takes off from an aircraft carrier with a runway length of 90...

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An inquisitive physics student and mountain climber climbs a 51.0-m-high cliff that overhangs a calm pool of water. He throws two stones vertically downward, 1.00 s apart, and observes that they cause a single splash. The first stone has an initial speed of 2.06 m/s. (b) What initial velocity must the second stone have if the two stones are to hit the water simultaneously?
The initial velocity (in m/s) of a particle is given by v0 = 3i - 4j. It experiences an acceleration of a = 2i + 5k. Find the position and velocity of the particle at time = 5.0 s
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A Lockheed Martin F-35 II lighting jet takes off from an aircraft carrier with a runway length of 90 m and a takeoff speed 70 m/s at the end of the runway. Jets are catapulted into airspace from the deck of an aircraft carrier with two sources of propulsion: the jet propulsion and the catapult. At the point of leaving the deck of the aircraft carrier, the F-35’s acceleration decreases to a constant acceleration of 5.0m/s2 at 30 with respect to the horizontal. (a) What is the initial acceleration of the F-35 on the deck of the aircraft carrier to make it airborne? (b) Write the position and velocity of the F-35 in unit vector notation from the point it leaves the deck of the aircraft carrier. (c) At what altitude is the fighter 5.0 s after it leaves the deck of the aircraft carrier? (d) What is its velocity and speed at this time? (e) How far has it traveled horizontally?
Does the initial velocity of an object have anything to do with its acceleration? For example, compared to dropping an object, if you throw it downward would the acceleration be different after you released it?
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The world long jump record is 8.95m. Treated as a projectile, what is the maximum range obtainable by a person if he has a take off speed of 9.5m/s? Assume the motion is on level ground and the angle is 45 degrees.
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