- #1
Caraniah
- 6
- 0
I have question about this chapter (and yes, this is my tutorial question) that i want to ask. I use the formula but i did not get the right answer. Please help me and tell me what's wrong...
Question
A block of 30 kg slides down a rough inclined plane with an acceleration 1.5 meter per second. The plane makes an angle of 28 degree with the horizontal and is 8.0 m long. Find
1) The kinetic energy of the block when it reaches the bottom of the incline. (Ans: 360.15J)
I use K=1/2 mv^2
2) The work done to overcome friction. (Ans:745.2 J)
I use K + U + W other = K + U
3)the friction force that acts on the block. (Ans: 93.2 N)
I use F - friction = ma
4) The coefficient of the kinetic between the block and the plane. (Answer: 0.36)
I use friction =kN
Question
A block of 30 kg slides down a rough inclined plane with an acceleration 1.5 meter per second. The plane makes an angle of 28 degree with the horizontal and is 8.0 m long. Find
1) The kinetic energy of the block when it reaches the bottom of the incline. (Ans: 360.15J)
I use K=1/2 mv^2
2) The work done to overcome friction. (Ans:745.2 J)
I use K + U + W other = K + U
3)the friction force that acts on the block. (Ans: 93.2 N)
I use F - friction = ma
4) The coefficient of the kinetic between the block and the plane. (Answer: 0.36)
I use friction =kN