final momentum = 4.7 (1000+2200)=15040
initial momentum = 1000 v
so
v = 15.04 m/s
A subcompact car, mass 1,000 kg, runs into and sticks to an at rest, 2,200 kg SUV. If their final speed is 4.7m/s ,what was the smaller cars initial speed?
a) 67 m/s
b) 30m/s
c) 2.2 m/s
d) 15 m/s
2 answers
15 m/s