Can the velocity of an object be negative when its acceleration is positive? What about vice versa? Give an example of each situation and describe what would be observed without using
any of the following words (or any variations of these words):
• positive
• negative
• accelerate
• decelerate
• velocity

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

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.

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?