How to solve

Momentum Problem $-(40\%)$

Consider the scene of a two$-$vehicle accident as shown in the accompanying figure. Impact and rest positions are shown.

Information:

weights: vehicle $1=2100lb,$ vehicle $2=2800$ lb

ground drag factor $0\mathrm{.}7$

all wheels in full$-$lock after impact

no significant pre$-$impact evasive steering

vehicle $1$ skidded into the impact with all wheels fully locked

vehicle $2$ did not brake before impact

grid dimension $22ft$; estimate all necessary dimensions using the grid within $+-1ft.$

Questions:

a$)$ Determine the speed of each vehicle at the time of impact $($i$.$e$.$ pre$-$impact speed$).$

b$)$ Determine the speed of Vehicle $1$ at the start of its skid marks.

WARNING: All estimated and extracted distances and angles must be clearly shown on this diagram before they are used in your work.