A cold duck slides down a snow covered hill inclined at an angle of 35° to the horizontal. If the ducks speed is a constant 5m/s, determine the horizontal and vertical components of its velocity.

Respuesta :

Given data:

* The angle of the inclined plane is,

[tex]\theta=35^{\circ}[/tex]

* The speed of the duck along the inclined plane is v = 5 m/s.

Solution:

The diagrammatic representation of the given case is,

From the triangle ABO,

[tex]\angle ABO=180^{\circ}-\angle AOB-\angle OAB[/tex]

Substituting the known values,

[tex]\begin{gathered} \angle ABO=180^{\circ}-90^{\circ}-35^{\circ} \\ \angle ABO=55^{\circ} \end{gathered}[/tex]

Thus, the inclined plane makes an angle of 55 degrees with the negative of the y-axis.

Similarly, the angle of the velocity of the duck along the inclined plane with the negative y-axis is 55 degrees.

Thus, the vertical component of the velocity is,

[tex]\begin{gathered} v_y=-v\cos (55^{\circ}) \\ v_y=-5\times\cos (55^{\circ}) \\ v_y=-2.88\text{ m/s} \end{gathered}[/tex]

The horizontal component of the velocity is,

[tex]\begin{gathered} v_x=v\sin (55^{\circ}) \\ v_x=5\sin (55^{\circ}) \\ v_x=4.096\text{ m/s} \end{gathered}[/tex]

Thus, the horizontal component of velocity is 4.096 meters per second, and the vertical component of velocity is -2.88 meters per second.

Ver imagen AshrafI90124