Speed Calculations
The calculation for speed
What is Distance / Time
What are the units for Acceleration?
m/s2
How do you calculate distance?
Distance = speed X time
The distance traveled in a given amount of time.
What is speed?
Bob travels at a constant speed of 100 miles per hour. How far does he go after 12 hours?
1200 miles
Distance:70 meters Time: 10 seconds
What is 7 m/s?
How do you calculate acceleration?
time= speed/distance
What's the difference between speed and velocity?
Speed is the distance something travels divided by the time elapsed.
Velocity includes both the speed and the direction of motion.
Bob is traveling at a speed of 100 miles per hour. How long does it take him to travel 2500 miles?
25 hours.
The cafeteria is 80 meters from Mrs. Quadagno's room. If you arrive in the classroom 40 seconds after leaving lunch, this will be your average speed.
What is 2 m/s
What is another name for newtons first law?
The law of inertia or inertia
If you walk 2 km from your house to a store and then back home, what is your distance?
Distance 4 km
The total distance an object travels over the total amount of time to travel this distance.
What is Average Speed?
If Sam is traveling 350 miles and it planning on driving at a constant speed of 50 miles per hour, how long will it take him to get to his destination?
7 hours.
It takes me 6 hours to drive to Nashville, TN. My route is 300 miles long. This is my average speed.
What is 50 miles per hour
Define the following words and provide unit if it has them.
Inertia
Acceleration
Mass
Force
Inertia- the resistance of an object to not change its current position of rest. So an object in rest will state in rest until acted on by an outside force.
Acceleration- The change in speed during a specified amount of time. m/s2
Mass- The amount of matter in something. kg
Force- the energy need for a change in motion or position
A person walks 3 miles North and 4 miles East, what is their Distance ?
Distance = 7 miles
Define motion in your own words.
Motion is the changing position of an object.
Donnie arrived to work 30 minutes after leaving his house. If he was traveling at a constant speed of 50 miles per hour, how far away was his work from his home?
25 miles. (Turn the 30 minutes into 0.5 hours)
A flock of birds migrating North travel 1,176 miles in 170 hours. What is the average speed of the flock in DAYS?
168 MILES/DAY
Explain all three laws of force.
1st law- any object in rest will remain in rest unless acted on by an external force. (Optional :Any object in motion will remain in motion unless acted on by and external force )
2nd law- the acceleration of an object is directly proportional to the net force and inversely proportional to the mass of the object.
3rd law- every object has an equal and opposite reaction
Analyze/Describe three ways a bicyclist can change velocity.
The bicyclist can speed up, slow down, or change direction.
The speed that a cop would see you traveling at... (remember my example)
Instantaneous Speed.
Mark has to ride his bike down two streets to get to school. The first street was 240 meters long and his speed was 2 meters per second. The second street was 720 meters long and during this time, he moved at a speed of 3 meters per second. How long did it take Mark to get to school?
360 seconds, or 6 minutes