When a 0.30 kg mass is suspended from a massless spring, the spring stretches a distance of 2.0 cm. Let 2.0 cm be the rest position for the mass-spring system. The mass is then pulled down an additional distance of 1.5 cm and released. Calculate the total mechanical energy of the system in SI Units. Spring constant can be found using Hooke's Law.

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

What structural formula represents 4 electrons shared between two atoms?

Consider two less-than-desirable options. in the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. in the second option you are driving 30 mph and crash head-on into a stationary brick wall. in neither case does your car bounce off the thing it hits, and the collision time is the same in both cases. which of these two situations would result in the greatest impact force?