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3 years ago

7

An Athlete is injured on field his teammates see that the injury is moderately swollen in the athlete reports the area is numb w

hat is the first thing that his teammates should do

1 answer:

blondinia [14]3 years ago

8 0

They should take him to their coach, or the athletic trainer.

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In one contest at the county fair, a spring-loaded plunger launches a ball at a speed of 3.2m/s from one corner of a smooth, fla

lara31 [8.8K]

Answer:

Explanation:

Given

Speed of ball $u=3.2\ m/s$

Plane is inclined at an angle $20^{\circ}$

To win the Game we need to hit the target at $x=2.4\ m$ away

Launch angle of ball $\theta$

Motion of ball can be considered in two planes i.e. Vertical to the plane and horizontal to the plane

So Net acceleration in vertical plane is $g\sin 20$

Range of Projectile is given by

$R=\frac{u^2\sin 2\theta }{g}$

for $R=2.4\ m$

$2.4=\frac{3.2^2\times sin 2\theta }{g\sin 20}$

$\sin 2\theta =\frac{2.4\times 9.8\times \sin 20}{3.2^2}$

$\sin 2\theta =0.7855$

$2\theta =51.77$

$\theta =25.88^{\circ}$

so ball must be launched at an angle of $25.88^{\circ}$

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3 years ago

Kindlieee hellpp!! ^_^

Setler79 [48]

I hope it will help you...

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2 years ago

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3 years ago

You are conducting an experiment inside a train car that may move along level rail tracks. A load is hung from the ceiling on a

Triss [41]

Here the weight is hung from the thread inside the ceiling of train

now the FBD of train is analysed

We can say

$Tcos\theta = mg$

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this shows that train must be in accelerating condition due to which the thread is making an angle with the vertical

now we will have

2 The train is not an inertial frame of reference.

Since train is accelerating so it must be non inertial frame

5 The train may be moving at a constant speed in a circle.

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8 The train must be accelerating.

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3 years ago

Pressure and volume changes at a constant temperature can be calculated using

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A. Boyle's law which states:

At constant temperature, the product of P and V of a given mass of an ideal gas in a closed system is always constant.

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3 years ago