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19 Cards in this Set
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how is velocity as a vector represented

arrow shows the direction of the motion
the arrow represents speed the length of the arrow is drown to a suitable scale 

define resultant

diagonal of a rectangle described by 2 vectors


how can you find the components of a vector

drow the vector with correct magnitude and orientation
measure the sides of the rectangle draw a rectangle so the vector is diagonal 

distinguish between vectors and scalars

vforce velocity acceleration and weight
smass times temperature speed 

describe the difference between vectors and scalars

a vector quantity includes both magnitude and direction, but a scalar quantity includes only magnitude


understand and identify action/reaction pairs player hit a ball with a bat

action player hits the ball the reaction is when the ball hits the bat and gives force back and that proples the ball forward


under what circumstances is momentum conserved

for all collisions as long as external forces do not act against it
even when objects do not move along the same straight line 

what factors affect an object momentum

the force that acts and the length of time it acts on it


define power and give it's mathematic equation

is the rate at which work is done. power = work done/time interval


under what circumstances is momentum conserved

for all collisions as long as external forces do not act against it
even when objects do not move along the same straight line 

define kinetic energy

energy of motion


define energy

the propert of an object that enables it to work


in terms of gravitational potential energy what is hight

distance above a chosen reference point


suppose that you apply a 70N horizontal force to a 32kg package, which pushes it 5 meters across a mailroom floor how much work do you do on the package

you have to multiply the force by the distance
350J 

what are the three examples of potential energy

elastic, chemical, gravitational


explain when work is done on an object

when a force acts on the object and the object moves in the direction of the force


under what circumstances is momentum conserved

for all collisions as long as external forces do not act against it
even when objects do not move along the same straight line 

what are the 2 ways to calculate gravitation potential energy

weight times hight
mass times acceleration times hight 

what are the 2 categories that work falls into

work is done against another force work change to the speed of a object
