Vežimėlis, riedėjęs horizontaliu paviršiumi 60 cm/s greičiu, susiduria su kitu vežimėliu, judančiu ta pačia kryptimi 180 cm/s greičiu. Po susidūrimo abu vežimėliai važiuoja ta pačia kryptimi vienodu 120 cm/s greičiu. Apskaičiuokite vežimėlių masių santykį.

Agymnast dismounts off the uneven bars in a tuck position with a radius of 0.3m (assume she is a solid sphere) and an angular velocity of 2rev/s. during the dismount she stretches out into the straight position, with a length of 1.5m, (assume she is a uniform rod through the center) for her landing. the gymnast has a mass of 50kg. what is her angular velocity in the straight position?

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Will you chech and finish these for me, because i am stumped with them.