Distance and Displacement
______ is the direction from starting point and length of a straight line from start to end point.
DISPLACEMENT is the direction from starting point and length of a straight line from start to end point.
What are the SI units for speed?
meters per second (m/s)
Velocity describes ______ and _______ of an object.
Velocity describes SPEED and DIRECTION of an object.
What are the SI units for acceleration?
m/s2
Which part of a distance-time graph represents the speed of the object?
The slope
When will displacement equal 0?
When object starts and ends at the same point
What is the equation used for calculating speed?
speed = distance / time
What is the equation for calculating acceleration?
a = (vf - Vi)/t
Which frame of reference should be chosen when describing the speed of the car you are driving?
A) truck in the lane next to you
B) sign post on the side of the road
C) passenger sitting next to you
B) sign post on the side of the road
Josh travels 10 km west, missed his destination, and walked back 3 km east.
What is Josh's distance traveled?
13 km
Sarah ran 20 m in 4 seconds, stopped for a 6 second break, and finally ran 70 m in 5 seconds.
What is Sarah's average speed?
90 m / 15 s = 6 m/s
A sail boat is in the ocean. The current is moving 4 m/s east and the wind is blowing 7 m/s west.
What is the resultant velocity of the boat?
3 m/s west
It is slowing down
How is it possible for 2 cars to travel the same speed but have different velocities?
they are traveling in different directions
Josh travels 10 km west, missed his destination, and walked back 3 km east.
What is Josh's displacement?
7 km west
How far can a car travel if it is going 50 km/h for 3.5 hours?
Distance = 50 km/h x 3.5 h
Distance = 175 km
How is an object at rest represented on a distance time graph?
Flat, horizontal line
Will walks 8 meters south to the park and another 6 meters east to his friend's house.
What is Will's distance AND displacement?
Distance = 14 m
Displacement = 10 m SE
A plane is flying at a speed of 600 km/h.
How long will it take for the plane to travel 450 km?
T = 0.75 h
What are the 2 scenarios that could occur and result in an acceleration = 0?
object is at rest
object's speed is constant