What obstacles or challenges are encountered in magnetic levitation?

Explain vector addition, triangle method and parallelogram method

The softest and hardest minerals are: softest hardest

Abumper car with a mass of 250 kg is traveling at a speed of 4 m/s. this bumper car collides and sticks to a second bumper car with a mass of 250 kg, which is initially at rest. what is the final speed of these two bumper cars after the collision, assuming they remain stuck together?