Speed Distance Time Calculations II (Hard)
Speed Distance Time Calculations I
Acceleration
Definitions
UNITS!!!!
100
A skateboarder rides his board at the skate park for 2.5 hours. In total, he skated 9.25 miles throughout the park before leaving to go home. What was his average speed? (in inches per year)
3.7 mph
100
A college student is driving back home for summer vacation. There are 140 miles driven at an average speed of 50 mph.
How long does the student take to get home?
2.8 hours
100
Acceleration is the change in __________________
velocity
100
What is the difference between speed and velocity
Velocity has a directional component
100
Name 2 possible units of speed.
miles per hour, meters per second etc.
200
If a skateboarder runs 3 meters per second, how many miles per hour is that?
6.71
200
A rower is going down the Merrimack River at 30 mph. The rower continued at this speed for 1.5 hours. How far did the rower travel down the river from where they started?
45 miles
200
Name 6 examples of something that accelerates
...
200
Δ - What does this symbol mean?
Delta - Change in
200
The units of velocity are
meters per second, miles per hour, etc.
300
If a runner and trackstar run 380,000 inches in 272,000 seconds, what was their average speed in miles per hour
.08
300
1. A group of friends are rollerblading down the sidewalk at 5 m/s. They take a quick break after rollerblading for 150 seconds. How far did they travel?
750 m
300
CHALLENGE: if you are traveling with constant velocity and change directions but not speed, are you accelerating and explain why.
YES - because your direction changes
300
Divide
300
Name 4 different units for distance.
miles, meters, inches, centimeters, foot, yard, light year
400
CHALLENGE: If a runner runs at 38 km/year and runs for 38 hours, how far did the runner run? (Answer in miles)
Jimmy will do this on the board
400
A roller coaster car rapidly picks up speed as it rolls down a slope. As it starts down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the slope, its speed is 22 m/s. What is its average acceleration?
6 m/s^2
400
The acceleration due to gravity on Earth is ________________ meters/second ^2
9.8 m/s^2
400
Fill in the blank -
the speed of an object in a particular ____________
direction
400
The units of acceleration are_____________
meters per second squared, kilometers per second squared.
500
Extra hard:Light travels at a speed of approximately 3x10^8 m/s or 670,000,000 miles per hour.
How many light years will the light have traveled in 7.25 minutes.
Jimmy will do on board
500
While at the skatepark, another skateboarder traveled 12.3 miles with an average speed of 3.45 mph. How long did they ride for
3.56 hours
500
CHALLENGE: acceleration is the _____________________ of velocity
Options: option, derivative, velocity, subtraction, addition, square, square root,
derivative
500
To make sure your calculations are correct, ______________ the values you calculated with those that you were given.
substitute
500
CHALLENGE: if the unit of time is in the order of 1x10^-9 s, what is the metric system name for how many seconds this is.
nanoseconds