Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
SFS SC CH11#1
Newton's First Law of Motion
| Question | Answer |
|---|---|
| law | a statement that describes events or relationships that exist in nature or relationships that exist in nature |
| Sir Isaac Newton | during the 1600's the English scientist ---- suggested three laws of motion |
| First Law | Newton's ---- all objects resist change in motion |
| rest | Newton's first law means that an object at ---stays at unless an unbalanced force acts on it |
| contines | Newton's first law means that an object in motion ----- moving in a straight line at a constant speed unless na unbalanced force acts on it |
| inertia | ----- the tendency of an object to resist any change in its state of motion |
| mass | the greater the ----- of an object, the more inertia the object has |
| friction | a force between surfaces that resists the movement of one surface past the other surface |
| energy | friction converts ----- of motion into thermal energy |
| helpful or harmful | friction can be ----- or ----- |
| control | without friction, motion would be very difficult to control |
| moving , slow | without friction your would not be able to start ---- or if moving, ------ down |
| reduce | wheels ----- friction becasue the rolling wheel and the surface it contacts peel apart rather than scrape against each other |
| air resistance | the friction from air molecules hitting an object as the object moves through the air |
| unbalanced | an ----- force can keep an object moving in a circle |
| orbit | an example of circular motion is when the force of gravity keeps a satellite in ---- around the earth |
| gravity | without -----, a satellite would fly off in a straight line |
| Newton's 2nd Law | when a force is applied to an object it causes the object to acceleate |
| mass | force = ----- x acceleration |
| direction | an object accelerates in the ------ of the force that acts on it |
| changes | when the acceleration of an object changes, the force acting on the object also is changing |
| Galileo | the Italian scientist ----- showed that falling objects with different masses have the same acceleration. |
| air | Galeileo's observation is sture unless the objects are affected by ----- resistance |
| resistance | air ------ causes a parachute to slow down the descent of a skydiver |
| streamline | a ---- object has a shape that reduces air resistance |
| aircraft | ----- have a streamline design |
| ships, submarines | streamlining is also helpful for objects that travel through water, such as ---- and ----- |
| easily | fish and marine mammals are streamlined to move through water ------ |
| pairs | all forces come in pairs |
| Newton's 3rd Law | when one object exerts a force upon a second object, the second object exerts an equal and opposite force upon the first object |
| action , reaction | Newton's third law also called the law of ---- and ----- |
| equal , opposite | according to 3rd: as a person walks, his foot pushes on the ground, but the ground pushes back with an ---- and ----- force |
Created by:
lyncall
Popular Science sets