A422n block is sitting on a frictionless surface and is connected by a massless, extension-less rope over a frictionless pulley to a 185n mass. what is the acceleration of the blocks and the tension in the cable.

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?