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science unit 3-2
6th grade science
| Question | Answer |
|---|---|
| a book is sliding across a table and slowing down. what statement best describes the forces acting on it? | an unbalanced force (friction) is acting opposite the motion. |
| what is an example of a vertical force? | gravity pulling a ball downward |
| what is an example of a non - contact force? | gravity |
| what is the net force when tow people pull on a rope in opposite directions with equal strength? | 0 N |
| an object will keep moving at the same speed and direction unless acted on by an unbalanced force. This describes: | inertia |
| how do the action and reaction forces affect each other? | they affect each other by using each others differences to power them up. |
| describe what action and reaction mean in your own words | if there is a force, there is something that happens. |
| what is the main difference between a balanced force and an unbalanced force? | balanced forces stay still, unbalanced forces move. |
| why does a balanced object stay still (think of the forces acting on it) | because the forces are equal |
| why does an unbalanced object move? (think of the forces acting on it) | because the forces are not equal |
| describe why objects stay at rest or keep moving unless acted on by a force? (1st law of motion-inertia) | when an object is at rest the forces are equal, when an object is moving they are not equal. |
| what force am i? I am invisible but constant. without me, you'd never feel your weight or see an apple falling from a tree. | gravity |
| what force am I? I quietly fight every movement, from sliding socks on the floor to cars stopping at a red light. without me, control would be impossible. | friction |
| what force am I? you can't see me, but I can pull and push metal objects without touching them. my strength depends on how close I am. | magnetism |
| what force am I? I don't act on my own; you must start me! when you push, pull, or throw something. I'm the force that gets it moving. | applied force |
| what force am I? I'm the quiet support that keeps everything in place. I push up while another force pulls down, balancing objects that rest on me. | normal force |
| what force a I? I work against motion every time you try to move something heavy across the floor, but I also keep you from slipping when you walk. Who am I? | friction |
Created by:
gabbypap
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