Two masses are compressed against a spring as shown in the figure; the system is at rest. The mass of m1 is 1.2 kg and m2
has a mass of 1.8 kg. When the masses are released, m2
travels to the right at 2.0 m/s. What is the speed of m1 after
the spring is released? Assume the horizontal surface is
frictionless.

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Ahanging spring stretches by 35.0 cm when an object of mass 450 g is hung on it at rest. in this situation, we define its position as x = 0. the object is pulled down an additional 18.0 cm and released from rest to oscillate without friction. what is its position x at a moment 84.4 s later? express your answer in cm.