Speed
What is speed?
the distance an object travels in a certain time
How is velocity different than speed?
Direction
Do we use speed or velocity when calculating acceleration?
Velocity
What do we use to tell if we are in motion or not?
Reference Point
How many cups of coffee does Ms.R drink in a day?
1 cup
What is the equation for speed?
Distance/Time
What is the equation for velocity?
Displacement (direction and distance)/ Time
What are the unit for acceleration?
m/s2
If the distance-time graph has a line plotted downward. What is the motion of the object?
The object is moving towards the refence point at a constant speed.
How do you measure wavelength?
Crest to crest or trough to trough
A plane travels 400 meters in 1 minute. What is the speed in meters per second?
6.66 m/s
Ryan swam 60 m/s. Is this velocity?
A car going 50m/s accelerates to pass a truck. Five seconds later the car is going 80m/s. Calculate the acceleration of the car.
6 m/s2
Dayana is pulling a wagon with 50 N to the right. Friction is working on the wagon in the opposite direction by 10 N. What is the net force?
40 N to the right
How many siblings does Ms.R have?
2
What is the speed of a jet plane that travels 528 meters in 4 seconds?
132 m/s
Eddie walks 50 meters southwest in 2 minutes. What is his velocity?
.41 m/s southwest
The space shuttle releases a space telescope into orbit around the earth. The telescope goes from being stationary to traveling at a speed of 1700 m/s in 25 seconds. What is the acceleration of the satellite?
68 m/s2
Draw a distance-time graph that displays an object that is not in motion then in motion at a slow constant speed away from the reference point. After this the object increases its speed from the reference point.
What is the step in the water cycle where plants draw water up from the soil and release it back into the atmosphere in the form of gas.
Transpiration
How far will a car travel in 25 min at 12 m/s?
18,000 meters
A caterpillar travels north across the length of a 2 m porch in 6.5 minutes. What is the average velocity of the caterpillar in m/s?
.005 m/s north
Josh rolled a bowling ball down a lane in 2.5 s. The ball traveled at a constant acceleration of 1.8 m/s2 down the lane and was traveling at a speed of 7.6 m/s by the time it reached the pins at the end of the lane. How fast was the ball going when it left Tim’s hand?
1.8=-x + 7.6/ 2.5
2.5·1.8=−x+7.6
4.5=−x+7.6
4.5+(−7.6)=(−x+7.6)+(−7.6)
4.5−7.6=−x+7.6−7.6
−3.1=−x
−x=3.1
x=3.1 m/s
A box with four strings is being pulled by four friends. Jimmy is pulling to the west with 35 N. Jessie is pulling to the west with 85 N. Kyle is pulling to the north with 15 N and Veronica is pulling to the south with 10 N.
120 N to the West and 5 N north
What is Ms.R's nieces name?
Elloise or Ellie