Speed & Velocity
It takes Sally 20 minutes to travel from her home to the mall, a trip of 30 miles. What is Sally's speed?
1.5 miles per minute
What are three conditions that can describe acceleration?
Speeding up, Slowing down, or turning.
If an object changes position in relation to another object, it is known to be in ___________.
Motion
Pete is driving down 7th street. He drives 150 meters in 18 seconds. Assuming he does not speed up or slow down, what is his speed in meters per second?
Velocity = change in position / change in time
Speed + Direction
Velocity
At exactly 2:00 pm, Tom pulls out of his driveway. He reaches Walmart at 2:10 pm, 5 miles away from his house. What is his speed?
0.5 miles per minute
What is the typical unit for acceleration?
Meters per second squared.
The length of the path between two points.
Distance
A roller coaster’s velocity at the top of a hill is 10 m/s. Two seconds later it reaches the bottom of the hill with a velocity of 26 m/s. What was the acceleration of the coaster?
Acceleration = change in velocity / change in time
The total number of units traveled by an object.
Distance
Bobby drives his car at a speed of 60 miles per hour for 4 hours. How far has he driven?
240 miles.
Toon Train is traveling at the speed of 10 m/s at the top of a hill. Five seconds later is reaches the bottom of the hill and is moving at 30 m/s. What is the rate of acceleration of Toon Train?
4 m/s2
_________ is represented on the x-axis of a position graph
Time
A plane’s average speed between two cities is 600 km/hr. If the trip takes 2.5 hrs. how far does the plane fly?
Velocity = change in position / change in time
Change in speed or direction.
Acceleration
What is the formula used to solve for Distance?
Distance = Velocity x Time
Pete the Penguin loves to sled down his favorite hill. If he hits a speed of 50 m/s after 5 seconds, what is his rate of acceleration? Hint: He starts at 0 m/s at the top of the hill.
10 m/s2
Describe the motion in the graph on the board.
The object is holding at a steady speed.
A baseball is thrown with a speed of 36 m/s before being struck by a bat. It is in contact with the bat for 0.5 seconds, and then moves in the opposite direction at a speed of 30 m/s. What is the acceleration of the ball?
Acceleration = change in velocity / change in time
Mr. Leto travels from his house to FHS and back home. What is his total displacement? (Different from Distance)
0
Goldie Goldfish, a speed swimmer, loves to race around the park’s pond, which is 0.5 miles around. If she can swim 20 laps around the track in 2 hours, what is her average speed?
5 miles per hour
Mr. Leto's car is going at 70m/s and slows to a stop in 5 seconds. What is the acceleration of Mr. Leto's car?
-14 m/s2
Describe the motion in the graph on the board.
The object is speeding up.
Mr. Leto digs a very large hole in the ground outside of FHS. He fills it with Jell-O and climbs to the top of the school. He jumps into the Jell-O because his students have driven him to end his teaching career. As he falls, he accelerates at a rate of 9.8 m/s2 for 2 seconds. What was Mr. Leto's speed just before he entombed himself in that gelatinous crypt?
Vf = V0 + at
The velocity at a specific moment in time.
Instantaneous Velocity