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djverab [1.8K]
3 years ago
13

Which are precautions to take when working with heat and fire?

Physics
1 answer:
shtirl [24]3 years ago
3 0
Always wear protected face gear and body gear, make sure you have an adult present and a fire extinguisher
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Let the velocity of projection is u and the angle of projection is 30°.

Let T is the time of flight and R is the horizontal distance traveled. As there is no force acting in horizontal direction, so the horizontal velocity remains constant. Let the particle hits the ground with velocity v.

initial horizontal component of velocity, ux = u Cos 30

initial vertical component of velocity, uy = u Sin 30

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Use first equation of motion

vy = uy - gT

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vy = - u Sin 30

The magnitude of final velocity is given by

v = \sqrt{v_{x}^{2}+v_{y}^{2}}

v = \sqrt{\left (uCos 30  \right )^{2}+\left (uSin 30  \right )^{2}}

v = u

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