Distance/Displacement
XQC walks 17 meters north, gets bored, then walks back 17 meters south. What is his distance and displacement?
Distance: 34 meters
Displacement: 0 meters
Gordon Ramsey is on his yacht. He looks at a lighthouse in the distance to tell if the yacht is moving. The lighthouse is acting as a _____________________
reference point
What is the formula and standard units for Velocity?
Velocity = Displacement/Time (units: m/s)
There are three cases where an object could be considered accelerating. What are those three cases?
An object speeds up, slows down, or changes direction.
What is the Velocity And Acceleration in section B?
velocity = 15 m/s
acceleration = 0 m/s^2
Is Distance a Scalar or a Vector Quantity
Scalar
You're going a road trip to Busan. As you sit inside your car, name three things you can spot outside to prove the car you are in is in motion.
Example include: street signs, lamp posts, trees, the sun, traffic lights, etc.
Define speed OR velocity in your own words.
Speed is the distance an object travels per unit of time. Simply how fast an object is moving! (Scalar)
Velocity is the displacement an object travels per unit of time. Simply, velocity is speed with direction! (vector)
Why are the standard units of acceleration m/s^2?
Since the formula for acceleration is velocity/time, and the units for velocity is m/s and time is s, (m/s/s = m/s^2)
What is the acceleration in section A?
Acceleration = 1.5 m/s^2
Other than distance and displacement, can you give me two other examples of scalar quantities?
Some examples include time, speed, mass, height length, etc.
A plane is flying at 600 km/h. To a passenger inside the plane, how does another passenger appear?
Stationary, because they share the same velocity inside the plane.
For his small morning run, Usain Bolt runs 25 laps around a circular track behind his 10 million dollar mansion. The track has a radius of 50 m, Calculate Bolt’s velocity.
(displacement = 0)
Your friend convinces you to go on the world's fastest roller coaster. During the ride, you accelerate from a speed of 4 m/s to 22 m/s in 3 seconds. What is the average acceleration?
acceleration: 6 m/s^2
During which section was the acceleration the highest?
Section A
Lebron James runs halfway around a circle of radius 10 meters. What is his distance and displacement?
Distance: 31.4 meters
Displacement: 20 meters
Even though the traffic lights outside the concert hall are stationary, it is not in line of sight of the objects in motion (Twice members)
John Cena enters a multisport event that involves 3.0 km of power walking, 50 km of cycling, and 12 km of running. It took him 2.7 hours of power walking, 1.4 hours of cycling, and 60 minutes of running to finish the race. Calculate the average speed over the entire race (km/h), rounded to the nearest tenth.
60 minutes = 1 hour
In your own words, explain what an acceleration of 30 m/s^2 means in terms of velocity and time.
An acceleration of 30 m/s^2 means that the velocity is changing by 30 m/s per second.
If this graph were an acceleration vs. time graph instead, would the velocity during section B be equal to 0?
No, the velocity would remain at a constant of 15 m/s.
Magnus Carlsen is playing some online chess. He moves his queen up 4 units, then moves it to the right. His queen's displacement is 5 units. How far did Magnus Carlsen move his queen to the right?
3 units
Why is perspective important in relative motion?
Depending on perspective, an object in motion may appear stationary. On the contrary, an object that is stationary may appear to be moving.
To cool off after his morning run, Usain bolt walks 300 meters north for 30 seconds, turns east then walks another 400 meters for 40 seconds. Calculate Bolt's velocity? Round to the nearest tenth.
Velocity = 7.1 m/s NE
Ironman makes a brand new exoskeleton suit during his breaktime! During a test run, he has an initial velocity of 50 m/s. He accelerates at a rate of 550 𝑚/𝑠^2 . Calculate the time it takes for him to reach a speed of 1000 m/s.
time = 1.7 seconds
What is the distance the object traveled in section D?
distance = 250 meters
(area of triangle)