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3 years ago

Why we study physics ?

Physics

2 answers:

vagabundo [1.1K]3 years ago

4 0

To know what is it. and i think that the reason behind your question is that PHYSICS IS DAMM HARD

Rus_ich [418]3 years ago

3 0

In my opinion help us to have a better knowledge of how things works basically by mechanism of forces, and why they work that form and physics help us to understand mostly everything that deal with everyday life, for example when youre walking in street you are appreciating more than two force, gravity, inertia, kinetic energy, normal force that the soil is exerting on you and others and physics will help us to understand the universe and its qualities

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(1 point) A projectile is fired from ground level with an initial speed of 600 m/sec and an angle of elevation of 30 degrees. Us

konstantin123 [22]

Answer:

(a) The range of the projectile is 31,813.18 m

(b) The maximum height of the projectile is 4,591.84 m

Explanation:

Given;

initial speed of the projectile, u = 600 m/s

angle of projection, θ = 30⁰

acceleration due to gravity, g = 9.8 m/s²

(a) The range of the projectile in meters;

$R = \frac{u^2sin \ 2\theta}{g} \\\\R = \frac{600^2 sin(2\times 30^0)}{9.8} \\\\R = \frac{600^2 sin (60^0)}{9.8} \\\\R = 31,813.18 \ m$

(b) The maximum height of the projectile in meters;

$H = \frac{u^2 sin^2\theta}{2g} \\\\H = \frac{600^2 (sin \ 30)^2}{2\times 9.8} \\\\H = \frac{600^2 (0.5)^2}{19.6} \\\\H = 4,591.84 \ m$

$v^2 = u^2 + 2gh\\\\v^2 = 600^2 + (2 \times 9.8)(4,591.84)\\\\v^2 = 360,000 + 90,000.064\\\\v = \sqrt{450,000.064} \\\\v = 670.82 \ m/s$

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