Distance and Displacement
Right now, sitting in your desk, you are moving both at a speed of 0 mph and at a speed of 67,000 mph. It depends on your frame of __________.
reference
Out of speed and velocity, which is a vector?
velocity
What is the speed formula?
s = d/t
What is the distance formula?
d = s x t
List 3 different ways an object can accelerate.
speed up, slow down, change direction
Susan exercises everyday by walking 2 times around her high school's track (400 m). What total distance does she walk every day?
800 m
Out of mass and weight, which is scalar?
mass
How is velocity different from speed?
velocity has a direction
What is the time formula?
t = d / s
What is the acceleration of a car that goes from 0 to 60 in 3 seconds?
20 mph/s
Susan exercises everyday by walking 2 times around her high school's track (400 m). What is her displacement when she finishes her walk?
0
A distance-time graph shows a straight line. What does this mean?
no motion / rest
This is the speed of a car that travels 270 miles in 3 hours.
90 mph
What does displacement show?
How far an object is from the starting point
This is what causes an object in free fall to accelerate at the rate of 9.8 m/s/s. (Hint**It's what holds us down to Earth)
Gravity
A soccer player starts at the goal and runs 50 ft. up the field. The player then turns around and runs 30 ft. back towards the goal. What is the player's total distance and displacement?
distance- 80 ft. displacement- 20 ft. away from the goal
A distance time graph shows a diagonal line. What does this represent?
constant speed
Lelani drives 130 miles from Raleigh to Wilmington. It takes her 2.5 hours to get there. How fast was she driving on average?
52 mph.
Motion is any change in _____.
position
A golf cart is going down the road at 6.2 m/s. After 8 seconds, it slows to a complete stop. What is the acceleration?
-.775 m/s^2
A car drives 5 miles south and then turns and goes 3 miles west. What is the cars total distance and displacement?
distance- 8 mi. displacement- 5.83 mi. SW
A velocity time graph shows a diagonal line going up. What does this mean?
Increasing acceleration
How long will it take you to get to New York City from Raleigh (486 miles) if you drive at an average speed of 60 mph? Disregard traffic.
8.1 hours
Define frame of reference
an object that is not moving that is used to determine motion
How is positive acceleration shown on a distance time graph vs. a velocity time graph?
d/t graph- curved line going up
v/t graph- straight diagonal line going up