A student throws a set of keys vertically upward to his fraternity brother, who is in a window 4.00 m above. The brother's outstretched hand catches the keys 1.70 s later. (a) With what initial velocity were the keys thrown? (b) What was the velocity of the keys just before they were caught? (Take upward as the positive direction.)

A student throws a set of keys vertically upward to his fraternity brother, who is in a window 4.00 m above. The brother's outstretched hand catches the keys 1.70 s later. (a) With what initial velocity were the keys thrown? (b) What was the velocity of the keys just before they were caught? (Take upward as the positive direction.)

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter3: Motion In Two Dimensions

Section: Chapter Questions

Problem 7OQ: A projectile is launched on the Earth with a certain initial velocity and moves without air...

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Distance and Speed

The speed, distance and time relation forms the basis of study of motion. You will need these concepts in the study of Mechanics. This concept is applicable for students who are studying the following courses –

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A student throws a set of keys vertically upward to his fraternity brother, who is in a window 4.00 m above. The brother's outstretched hand catches the keys 1.70 s later.

(a) With what initial velocity were the keys thrown?

(b) What was the velocity of the keys just before they were caught? (Take upward as the positive direction.)

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