Answer to Question #152923 in Physics for Emanuel

Question #152923

what is the acceleration of sphere rolling down a plane inclined at an angle 30° to horizontal?

Expert's answer

$ma=mg\sin\alpha-F_f$

$I\epsilon=r\cdot F_f\to (2/5)mr^2a/r=rF_f\to F_f=(2/5)ma$

$ma=mg\sin\alpha-(2/5)ma \to$

$a=(5/7)g\sin\alpha=(5/7)\cdot9.8\cdot\sin30°=3.5(m/s^2)$

Learn more about our help with Assignments: Physics

Comments

No comments. Be the first!

Leave a comment

Related Questions

1. Show that the functions f(vt-x) represen a plane progressivee wave propagating in the positive X dir
2. You have just got down at a railway station with a 25 kg luggage from a train. Luckily for you, the
3. A 0.60-kg block attached to a spring with force constant 130 N/m is free to move on a frictionless,
4. 1- You are standing on an icy surface. Your friend throws a ball with 0.4 kg at 10 m/s velocity. If
5. According to the figure below an experiment has been conducted where some of the most important comp
6. time (s) 0 2 4 6 8 10 12 position (m) 0 4 16 36 64 100 144 (i) Determine the motion of car.
7. A projectile is fired in such a way that its horizontal range is equal to 12.5 times its maximum hei