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19 Cards in this Set
- Front
- Back
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how is velocity as a vector represented
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arrow shows the direction of the motion
the arrow represents speed the length of the arrow is drown to a suitable scale |
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define resultant
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diagonal of a rectangle described by 2 vectors
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how can you find the components of a vector
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drow the vector with correct magnitude and orientation
measure the sides of the rectangle draw a rectangle so the vector is diagonal |
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distinguish between vectors and scalars
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v-force velocity acceleration and weight
s-mass times temperature speed |
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describe the difference between vectors and scalars
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a vector quantity includes both magnitude and direction, but a scalar quantity includes only magnitude
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understand and identify action/reaction pairs player hit a ball with a bat
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action player hits the ball the reaction is when the ball hits the bat and gives force back and that proples the ball forward
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under what circumstances is momentum conserved
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for all collisions as long as external forces do not act against it
even when objects do not move along the same straight line |
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what factors affect an object momentum
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the force that acts and the length of time it acts on it
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define power and give it's mathematic equation
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is the rate at which work is done. power = work done/time interval
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under what circumstances is momentum conserved
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for all collisions as long as external forces do not act against it
even when objects do not move along the same straight line |
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define kinetic energy
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energy of motion
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define energy
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the propert of an object that enables it to work
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in terms of gravitational potential energy what is hight
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distance above a chosen reference point
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suppose that you apply a 70-N horizontal force to a 32-kg package, which pushes it 5 meters across a mailroom floor how much work do you do on the package
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you have to multiply the force by the distance
350J |
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what are the three examples of potential energy
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elastic, chemical, gravitational
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explain when work is done on an object
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when a force acts on the object and the object moves in the direction of the force
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under what circumstances is momentum conserved
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for all collisions as long as external forces do not act against it
even when objects do not move along the same straight line |
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what are the 2 ways to calculate gravitation potential energy
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weight times hight
mass times acceleration times hight |
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what are the 2 categories that work falls into
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work is done against another force work change to the speed of a object
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