Direction Matters, or Does It?
y=mx+b
Dots in Motion
Rise, Run, Repeat
Not Shakespeare, but Close
100
Two vectors we've discussed this unit are ___ and ___.
displacement, velocity, acceleration, or momentum
100
A plane travels 500 km in 2 hours. What is the average speed of the plane?
250 km/hr
100
An object is going to the right at a constant speed.
Dots should be evenly spaced with an arrow pointed right
100
What is the speed of the object at C?
0 m/s
100
Describe the motion in A
The car is moving right at a constant speed.
200
The two scalars we've discussed this unit are ___ and ___.
distance, speed
200
A 4,500 kg truck rolling at 0.6 m/s has a momentum of ___.
2700 kgm/s
200
An object is traveling left and speeding up.
Starting on the right side, dots should be closer together and as they go left, get further and further apart. There should be an arrow indicating left as well.
200
What is the velocity of the object at point 2?
positive 60 m/s
200
What is the object doing at B?
Moving backward at a constant rate
300
Velocity is a vector, while speed is not, because ...
velocity includes a direction, while speed does not.
300
A car travels at a constant velocity of 40 m/s North for 15 seconds, so they have a displacement of ___.
600 meters North
300
An object moves with a constant, rightward velocity. Then it remains at rest for several seconds. Finally, the it rapidly accelerates with a rightward acceleration
Dots should start on the left side with even spacing, then stack on top of one other for a bit, then, starting close together, get further and further apart. There should be an arrow to the right.
300
What is the speed of the object at A?
2 m/s
300
What is occurring in C?
The car is traveling to the right and slowing down, then stops.
400
The slope of the line of a position vs time graph shows...
how fast and in what direction the object is moving, eg. velocity.
400
What is the acceleration of a car going from 30 m/s to 0 m/s in 5 seconds?
-6 m/s2
400
An object moves with a leftward velocity and a rightward acceleration.
Starting from the right, dots should start far apart and get closer together, with an arrow pointing to the left.
400
What is occurring at E?
The object is moving backwards quickly, then slowing down and stopping.
400
Describe what occurs in the graph below.
1: It starts at rest, accelerating to the right.
2: Stays at a constant speed.
3: Slows down and stops.
4: From rest, starts to speed up to the left.
5: Slows down and stops.
500
The three ways an object can accelerate are...
speeding up, slowing down, and changing direction.
500
A ball is being thrown backwards at 5 m/s on a bus traveling forward at 15 m/s. What is the velocity of the ball relative to both the bus and a point on the ground?
Relative to the bus-5 m/s backwards
Relative to the ground-10 m/s forward
500
An object moves with a rightward acceleration with a starting velocity to the left. Then, it remains at rest for several seconds. Finally, it moves to the left with a low constant speed.
Starting from the right, dots should start far apart and get closer together, then stack on top of each other for a bit, then continue left with even spacing.
There should be an arrow pointing to the left.
500
What is the acceleration of the object in section 1?
+6m/s2
500
Describe the motion occurring in E.
The car is moving quickly in the positive direction, slows down, and stops. It then speeds up to the right.