Question

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

Answer 1

Given

Mass of the object, m=5 kg

Length of the inclined plane, s=3m

Angle of inclination,

`\theta=10^o`

To find

Calculate its speed just before it hits the ground.

Step-by-step explanation

Here the acceleration is

`\begin{gathered} a=gsin\theta \\ \Rightarrow a=9.8sin10^o \end{gathered}`

The initial velocity is zero.

So the final velocity is

`\begin{gathered} v=√(2as) \\ \Rightarrow v=√(2*9.8sin10^o*3) \\ \Rightarrow v=3.19\text{ m/s} \end{gathered}`

Conclusion

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