Speed
Scalar
Is a velocity a scalar or a vector?
Vector
The length between two objects
distance
The total direction and distance between final position and initial position
displacement
How many meters are in a kilometer?
1,000
You travel 100 meters in 10 secs. What is your speed in m/s?
10 m/s
A train goes east 7000 km. It backs up 8000 km west. What is the displacement?
1,000 meters west
You walk to your friends house. It's 300 meters down the street. They aren't home so you go back home and walk to another friends house that lives 100 meters the other direction from your house.
What distance did you travel?
700 m
Is displacement a scalar or a vector?
Vector
Which is bigger...a hectogram or a decigram?
hectogram
You are driving at a speed of 10 m/s. How long does it take you to drive 200 meters?
20 secs
Velocity is determined by dividing displacement by
Change in time
Is distance a scalar or a vector?
Scalar
True or False: Displacement is the sum of the entire distance traveled to arrive at a new location?
FALSE
How many seconds are in an hour?
3,600
Your rocket car travels at 10,000 m/s. How can you go in an hour?
36,000,000 meters
You walk 100 meters east on the street. Then you walk 200 meters west. It takes you 100 secs. What is your velocity?
1 m/s west
Radio waves go to the moon and back. The moon is 384,000 km away from earth. What distance did they travel in meters?
768,000,000 meters
Taylor went to Target which was SOUTH 10km from his house. He then traveled WEST 18km to go to his friend's place. Lastly, he went 5km NORTH to go to the arcade.
What is his total displacement from home?
hint: draw a triangle! a^2 + b^2 = c^2
Draw it out. Draw a dashed line between the start and end point (the hypotenuse of the triangle).
Now 10 - 5 = 5 so we have a triangle with a = 5km and b = 18km.
a^2 + b^2 = c^2
25 + 324 = c^2 so c must equal 18.68 which is the displacement.
567 hectometers is how many km?
56.7 km
A bird flies 45 km/hr for 6.5 hrs. What is its total distance of the flight?
292.5 km
A man runs home SOUTH 30km/hr for 1hr. Then he runs 10km/hr WEST for 1hr. What is his velocity in km/hr AND what cardinal direction was he running?
a^2 + b^2 = c^2
Distance = speed * time so...
a = 30km South (cause 30 * 1 = 30)
b = 10km West (cause 10 * 1 = 10)
30^2 + 10^2 = c^2
900 + 100 = 1000 = c^2 so c = 31.62 (this is our displacement)
so 31.6km / 2 hr = 15.81 km/hr and he ran SW
If you know the speed at which you are traveling and the time you have traveled, how can you find out how far you have traveled?
Speed X time
You run 100 m east. Your turn around and run back 200 meters. You turn around and run back 200 meters. What is your displacement?
100 meters.
How many kg are 5, 467 grams?
5.467 kilogram