A(n) 6.9 kg object moving at 2.8 m/s eastward has a one-dimensional elastic collision with a(n) 5.4 kg object moving at 3.9 m/s in the opposite direction. What is the total kinetic energy of the two-mass system after the collision?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.