BOARD PROBLEM A soldier, hiding in a 3.5-meter-deep hole, threw a grenade with an initial velocity of 28.0 m/s at a launching angle of 35° from the horizontal. A pile of sandbags, 3.0 meters in height, is located exactly 12.0 meters (horizontally) from where the soldier is. Set the ground surface as y = 0. (a) Will the sandbags be able to block the grenade? Show calculations that support your answer. (b) What will be the velocity of the grenade as soon as it hits the ground? (c) Disregarding the sandbags, if the grenade explodes 1.7 seconds after it was thrown, at what position, 7, will it explode? Express your answer in unit-vector form.

Glencoe Physics: Principles and Problems, Student Edition
1st Edition
ISBN:9780078807213
Author:Paul W. Zitzewitz
Publisher:Paul W. Zitzewitz
Chapter6: Motion In Two Dimensions
Section: Chapter Questions
Problem 87A
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BOARD PROBLEM
A soldier, hiding in a 3.5-meter-deep hole, threw a grenade with an initial velocity of 28.0
m/s at a launching angle of 35° from the horizontal. A pile of sandbags, 3.0 meters in height,
is located exactly 12.0 meters (horizontally) from where the soldier is. Set the ground surface
as y = 0.
(a) Will the sandbags be able to block the grenade? Show calculations that support your
answer.
(b) What will be the velocity of the grenade as soon as it hits the ground?
(c) Disregarding the sandbags, if the grenade explodes 1.7 seconds after it was thrown, at
what position, 7, will it explode? Express your answer in unit-vector form.
Transcribed Image Text:BOARD PROBLEM A soldier, hiding in a 3.5-meter-deep hole, threw a grenade with an initial velocity of 28.0 m/s at a launching angle of 35° from the horizontal. A pile of sandbags, 3.0 meters in height, is located exactly 12.0 meters (horizontally) from where the soldier is. Set the ground surface as y = 0. (a) Will the sandbags be able to block the grenade? Show calculations that support your answer. (b) What will be the velocity of the grenade as soon as it hits the ground? (c) Disregarding the sandbags, if the grenade explodes 1.7 seconds after it was thrown, at what position, 7, will it explode? Express your answer in unit-vector form.
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