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25 Cards in this Set
- Front
- Back
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What is Frame of reference |
A system of objects that aren't moving with respect for each other |
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Define Speed |
The ratio of the distance an object moves to the amount of time the object moves |
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Define velocity |
Speed an object is moving, measured relative to a reference point |
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What is the equation used to find average speed |
s=d/t |
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What is acceleration |
The rate at which velocity changes |
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What is Free fall, give an example |
acceleration due to the change in speed |
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A ball rolls down a ramp, starting from rest. After 2 seconds, its velocity is 6 meters per second, What is the acceleration of the ball |
3 6/2=3 |
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How do we get net force |
By either adding or subtracting the two forces that are pushing or pulling against an object |
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give an example of adding netforces give an example of subtracting forces give an example of forcses equaling zero |
two objects pushing the same way against an object at 60n and 30n would equal 90n Two objects one pushing one pulling against an object, one at 60n and the other at 30n equalling 30n Two objects, one pushing and one pulling but both are 40n equalling 0 |
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equation of speed equation of velocity equation of acceleration |
speed=distance/time velocity=distnance/time acceleration=(final velocity-initial velocity/time |
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How does newton's first law relate to change in motion to a zero net force |
Inmif an object is having 2 things pushing and pulling with the same force then it will be 0 n |
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How do newtons second law relate force, mass, and acceleration |
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object. |
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what is inertia |
an object will stay in rest/motion until another object acts on it |
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describe examples of the 3 laws |
1. Inertia 2. object's acceleration depends on the force pushing 3. action reaction |
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If an object is moving with constant velocity, what do we know about its acceleration |
the speed and direction don't change |
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what is force |
the push or pull against an object |
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how do forces affect the motion of an object |
without force the object wouldn't move because you need force to move things |
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How do we measure force |
Measured on a scale and in newtons |
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what is net force |
An overall force acting on an object after the forces are combined |
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What are the main 4 types of friction |
Sliding, rolling, static, fluid |
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To find the net force of tow objects moving the same direction you would _________ their forces |
Add |
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An _____________ force allways causes a change in position, speed of direcion of an object |
Unbalanced |
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The total amount of force on an object is called______________ |
Net force |
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To find the net force of two objects moving in opposite direction you would _________ their forces |
subtract |
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force is measured in ____________ |
newtons |
