1. release of pressure a. animals that burrow underground
cause this force

plant growth b. this force would be in affect on a
windy day

freezing and thawing (ice wedging) c. this force makes rocks crack and
flake off

animal actions d. occurs in cool climates

abrasion e. a buckled up sidewalk would be
caused b this force

Identify two factors that determine the rate of stream erosion

Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and

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?