RECExample(2):- An airplane is moving horizontally at 108 km/h at an altitude of1000 m toward a target on the ground which intended to be bombed. Estimatewhere the bomb must be released in order to hit the target, also calculate thevelocity with which the bomb hit the target.Ans. X-428.5 m, V = 143 m/secV.- 108 km/h1000 mB RECExample(3):- A projectile isthe edge of a 150 m cliff with an initialvelocity of 180 m/sec at an angle of 30° with the horizontal. Neglecting airresistance, find:-(a) The horizontal distance from the gun to the point where the projectile strikesthe ground.(b) The greatest elevation above the ground reached by the projectile.Ans. (a) X = 3102.4 m, (b) Greatest elevation = 562. 8 m180 mis150 m

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where the bomb must be released in order to hit the target, also calculate the velocity with which the bomb hit the target. Ans. X = 428.5 m, V = 143 m/sec

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter5: Analysis Of Convection Heat Transfer

Section: Chapter Questions

Problem 5.32P

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Concept explainers

Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.

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REC
Example(2):- An airplane is moving horizontally at 108 km/h at an altitude of
1000 m toward a target on the ground which intended to be bombed. Estimate
where the bomb must be released in order to hit the target, also calculate the
velocity with which the bomb hit the target.
Ans. X-428.5 m, V = 143 m/sec
V.- 108 km/h
1000 m
B

REC
Example(3):- A projectile is
the edge of a 150 m cliff with an initial
velocity of 180 m/sec at an angle of 30° with the horizontal. Neglecting air
resistance, find:-
(a) The horizontal distance from the gun to the point where the projectile strikes
the ground.
(b) The greatest elevation above the ground reached by the projectile.
Ans. (a) X = 3102.4 m, (b) Greatest elevation = 562. 8 m
180 mis
150 m

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