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egoroff_w [7]
3 years ago
6

#9 help plssssssssss

Physics
1 answer:
fenix001 [56]3 years ago
4 0
#9 because you cant get more work out than you put in and you cant have a machine that is over 100% efficient
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two forces 5N and T act on a stone and are directed due north west and north east respectively. If the 5N force makes an angle 6
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A rescue airplane is diving at an angle of 37º below the horizontal with a speed of 250 m/s. It releases a survival package when
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<em>The correct option is 1.  720 m</em>

Explanation:

<u>Projectile Motion</u>

When an object is launched in free air (no friction) with an initial speed vo at an angle \theta, it describes a curve which has two components: one in the horizontal direction and the other in the vertical direction. The data provided gives us the initial conditions of the survival package's launch.

\displaystyle V_o=250\ m/s

\displaystyle \theta =-37^o

The initial velocity has these components in the x and y coordinates respectively:

\displaystyle V_{ox}=250\ cos(-37^o)=199.7\ m/s

\displaystyle V_{oy}=250\ sin(-37^o)=-150.5\ m/s

And we know the plane has an altitude of 600 m, so the package will reach ground level when:

\displaystyle y=-600\ m

The vertical distance traveled is given by:

\displaystyle y=V_{oy}\ t-\frac{g\ t^2}{2}=-600

We'll set up an equation to find the time when the package lands

\displaystyle -150.5t-4.9\ t^2=-600

\displaystyle -4.9\ t^2-150.5\ t+600=0

Solving for t, we find only one positive solution:

\displaystyle t=3.6\ sec

The horizontal distance is:

\displaystyle x=V_{ox}.t=199.7\times3.6=720\ m

The correct option is 1.  720 m

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