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D. O499.917 JE. O 1358.602 J4. An object of mass 5 kg is sliding downa friction less inclined plane of length3 m that makes an angle of10 deg. Calculate its speed just before it hits the ground. (1 point)A. 03.195 m/sB. O 1.958 m/sC. O5.58 m/sD. O2.525 m/sE. 04.225 m/s5. A roller coaster extends to the groundfrom a height of 39 m (point A) and then risesAn obiect of mass 12 kg

D O499917 JE O 1358602 J4 An Object Of Mass 5 Kg Is Sliding Downa Friction Less Inclined Plane Of Length3 M That Makes An Angle Of10 Deg Calculate Its Speed Jus class=

Sagot :

Given

Mass of the object, m=5 kg

Length of the inclined plane, s=3m

Angle of inclination,

[tex]\theta=10^o[/tex]

To find

Calculate its speed just before it hits the ground.

Explanation

Here the acceleration is

[tex]\begin{gathered} a=gsin\theta \\ \Rightarrow a=9.8sin10^o \end{gathered}[/tex]

The initial velocity is zero.

So the final velocity is

[tex]\begin{gathered} v=\sqrt{2as} \\ \Rightarrow v=\sqrt{2\times9.8sin10^o\times3} \\ \Rightarrow v=3.19\text{ m/s} \end{gathered}[/tex]

Conclusion

The velocity before it hit the ground, A.3.19 m/s

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