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Rainbow Science 7&8
Do Something useful and Falling Up
Question | Answer |
---|---|
A solid object with a single force placed on it in a single direction will accelerate in what kind of line? | Straight |
A solid object that has two forces on it in different (but not opposite) directions will move in what shape? | Curved |
Objects with many forces on them in many differnt directions move in what type of pattern? | Complex patterns |
You can get what type of motion using inertia of a moving object and applying a force toward a center point (think orbit) | Circular |
When forced is placed on fluid, what results? | Waves |
What does "work" mean in physics? | A force applied over a distance. We calculate the amount of work that is done by multiplying the force by the distance over which the force is applied |
Instead of us pushing and pulling things with our bare hands we can use what to help us do the job? | Machines |
What can we use to help us lift a large mass like a 500-pound piano? | A lever |
What pivots in the middle of the seesaw to make it go up and down? | Fulcrum |
One of the greatest laws of nature is that all things tend to become what? | Less organized over time |
What is stored energy called? | Potential energy |
Which has stored energy? A match that has already been lit or a fresh apple? | A fresh apple |
Which has stored energy? A ball stored up on a high shelf or a battery in a remote-controled car that's been used over and over again? | A ball |
Realeased erergy is called? | Kinetic energy (energy in motion) |
Is a rotted apple Potential energy or Kinetic energy? | Kinetic energy -- because it happens on its own -- you can not restore the apple back to the way it was before it rotted |