A2-kg object, moving at 1 m/s, collides with a 1-kg object that is initially at rest. after the collision, the two objects are found to move away from each other at 1 m/s. assume they form an isolated system. (a) what are their actual final velocities in the earth reference frame? (b) what is the velocity of the center of mass of this system? does it change as a result of the collision?

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

What are similarities and differences between refraction, reflection, diffraction and absorption?