PLEASE HELP you were in a spaceship and launched a cannonball into frictionless space, how much force
would have to be exerted on the ball to keep it going?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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.

The total amount of energy contained in an object