To find the x component use the following formula, where Ф = theta = the angle 'a' makes with the x axis.
It is equal to the acceleration of the object.
As the skateboard rolls down the ramp it loses potential energy and gains kinetic energy.
Answer:
1) Li = 0048678 kg -m^2/s
2) 0.129483 joule
3) 3.4745 Rad/s
4) 0.08456 joule
Explanation:
1) INITIAL ANGULAR MOMENTUM
we know that
2) INITIAL ROTATIONAL KINETIC ENERGY
3) FINAL ANGULAR VELOCITY
from conservation of angular momentum
Li =Lf
= 3.4745 Rad/s
4) FINAL ROTATIONAL KINETIC ENERGY