A skater with a mass of 72 kg is traveling east at 5.8 m/s when he collides with another skater of mass 45 kg heading 60° south of west at 12 m/s. If they stay tangled together, what is their final velocity?

The final velocity is 5.87 m/s

Explanation:

Given-

mass, = 72 kg

speed, = 5.8 m/s

,  = 45 kg

,  = 12 m/s

Θ = 60°

Final velocity, v = ?

Applying the conservation of momentum:

X + X = ( + ) v

72 X 5.8 + 45 X 12 X cos 60° = (72 + 45) v

v = 417.6 + 540 X

v = 417.6 +

v = 5.87 m/s

The final velocity is 5.87 m/s

4

explanation:

4

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.