A 0.22kg mousetrap car has 3.1 J of potential energy due to the spring in the mouse trap. What is the maximum speed the car will reach? Show your work and include units.

How would a small bar magnet be oriented when placed at position x?

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?

With physics question #5? for any !