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Forces&Newton'sLaw
Question | Answer |
---|---|
Force | A push or pull applied to an object |
Net Force | When two or more forces act on an object at the same time |
Balanced Forces | The forces pushing on an object are the same |
Unbalanced Forces | The forces aren't the same |
Describe how to combine unequal forces acting on opposite directions. | The stronger force would be subtracted by the other force and the answer would go the direction that the stronger force is pushing to. |
What are the SI units of force | Newton(s) (N) |
130N to the right and 40N to the left | 90N |
120N to the right and 150N to the right | 270N |
140N and 30N to the right and 170N to the left | 0(N) (The object would not move) |
150N and 120N to the right and 70N and 30N to the left | 200N |
Friction | the force that opposes the sliding motion of two touching surface |
Sliding Friction | when a force slides over another force |
Static friction | when objects aren't moving |
Fluid Friction | when solid objects moves through a fluid |
Rolling Friction | when an object rolls across the surface |
Gravity | A force that pushes us together/to the ground |
What is the Law of Universal Gravitation | The force of gravity act between all objects in the universe that have mass |
What two factors affect the gravitational attractions between objects? | Mass/Distance |
What is the difference between mass and weight? | Weight is the gravity on mass and mass is what makes up an object |
Newton's First Law of Motion | An object at rest will stay at rest and a moving object will continue to move with force applied. |
Newton's Second Law of Motion | An object's acceleration depends on its mass and net force |
Newton's Third Law of Motion | With every object at motion there is an opposite and equal reaction |
800kg car at a rate of 5 m/s squared | 4000N |
momentum | mas times velocity |