An object cannot remain at rest unless which of the following holds? the net force acting on it is zero. the net force acting on it is constant. there are no forces at all acting on it. there is only one force acting on it.

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Click the game tab at the bottom of the simulation and select level 1. (there is no seesaw balance for this part of the activity.) balance the first equation, and click check to see if you got it right. if you can’t balance it in the first try, you can try again. work through the five equations for level 1. click continue to go on to level 2, and later level 3. each level is more difficult than the one before. keep trying until all the equations are balanced. in one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.

What are the north and south poles of a solenoid change with?