PHYS124 Lecture Notes - Lecture 8: Acceleration, Point Particle, Arc Length

• School: University of Alberta
• Department: Physics
• Course: PHYS124
• Professor: Erik Rosolowsky

Document Summary

Point particle on the centre of mass. Since ninjas are going through the same amount of angle, same amount of time, angular speed is the same. There is a 90 degree angle between the centripetal acceleration and tangential acceleration. W= /t (-) direction is clockwise (+) direction is counterclockwise. If decelerating = is less than 0 (cid:862)ho(cid:449) fast are the(cid:455) tra(cid:448)elli(cid:374)g(cid:863) solve for linear speed v=rw va= rw = (8. 0)(0. 5rad/s) = 4 vb = rw = (20)(0. 5rad/s) = 10. Arc length s = r where s (m) r (m) F = i +wt + ( f - i) r = s t2 w= 2pi/4pi seconds = 0. 5rads/s t2)r= s. Rolling motion means that the bottom of a wheel is not moving with respect to the ground. Tops of moving objects are moving 2rw. If the mass is further away from the axis of spinning, the kinetic rotational energy is greater.