University:
High School
Course:
High School Physics
Academic year:

2023
Views:

201

Pages:

1
Author:

Rose G

FORCES Melocitythe velocity of an objecta person walks in a straightIS Its speed in a givenune from point A to B, coverina adirection.assance of 50m this takes 40scalculate the persons velocity.we calculate velocity, theAspeed= distanceE50mtimesame way we calculat speed.WE50=40= 1.25mlssouthbut in the case of velocity,3we also have to State direction.there is a special case 07 velocity, andupthat is for objects movina in circles.this shows a car movina arouna acircular race track at a constant speedeven knouan the car 13 moving with aconstant speca. Its airection is constantlychanging. this means its velocity changesaware.Distance time graphsa person walked 100m in200a scraight une in 100s160They slopped for 40s and120then walked another 70m100m802.52.8in 50s.40mismismisthe gradient ot a distance0time araph tells us the objects100SPEED.100s1403200IN EXAM you COULD BE100gradeent = 100= 1m/s170 2.8SHOWN A DISTANCE TIME60GRAPH AND HAVE TO FIND100= 0.7mls140OUT THE SPEED.2.5200If we want to know the speed at 100s160draw a tangent unework out gradient at une.120160-135-1251251. 5mls80(135-55)801.smis40suste kennedu05055100135206this curve tells us the object isconstantly changing speea. (accelerating)