Question

A 1.2 x 103 kg racecar, with a velocity of 8 m/s, collides with an unsuspecting 80 kg honey badger who is standing

still. After the collision, the racecar is traveling at 2 m/s. What is the velocity of the honey badger after the
collision if it goes flying?

Answer 1

Answer: 90 m/s

Step-by-step explanation:

Given

mass of racecar
`M=1.2*10^3\ kg`

velocity of racecar
`u=8\ m/s`

mass of still honeybadger
`m=80\ kg`

after collision race car is traveling at a speed of
`v_1=2\ m/s`

conserving linear momentum

`Mu+m*0=Mv_1+ mv_2\quad[v_2=\text{velocity of honeybadger after colllision}]`

`1.2*10^3*8+0=1.2*10^3*2+80* v_2`

`1.2*10^3(8-2)=80v_2\\v_2=(7.2*10^3)/(80)=90\ m/s`