Question

A 95 kg Running back, Tiki Barber breaks away from the line and was running 4.1 m/s when tackled by Honde.

Ronde weighs 85 kg and was running 5.5 m/s. If momentum was conserved, what was their speed, as they
collectively fell to the ground?
a
467.5 m/s
180 m/s
Ob
ОООО
389.5 m/s
Od
4.76 m/s

Answer 1

• m1=95kg
• m2=85kg
• v1=4.1m/s
• v_2=5.5m/s
• v3=?

`\\ \sf\longmapsto m1v1+m2v2=(m1+m2)v3`

`\\ \sf\longmapsto 95(4.1)+85(5.5)=(95+85)v3`

`\\ \sf\longmapsto 389.5+467.5=180v3`

`\\ \sf\longmapsto 857=180v3`

`\\ \sf\longmapsto v3=857/180`

`\\ \sf\longmapsto v3=4.76m/s`