Argue Against 1
"An object with a velocity of -10 m/s can only be moving to the left."
I can say negative is towards the right, or downwards, or upwards, or diagonal
Any unit used for time
What is "seconds", "minutes", "hours", etc.?
State all the facts about the object's motion. (Assume positive is to the right and upwards)
vx = 10 m/s
The object is moving to the right.
"A car with an acceleration towards the left must be moving towards the left."
The car could be slowing down (has an acceleration in the opposite direction of its motion)
Any unit used for velocity
What is m/s, miles per hour, feet per minute, etc.
State all the facts about the object's motion:
xf = (-10 m/s)(5s) + (3m)
Constant velocity: -10 m/s
Time duration: 5s
intial position: 3m
"An object with an acceleration of zero must have a velocity of zero."
An object can have a constant velocity with an acceleration of zero.
The quantity that can be described with the units "meters per second squared" or " m/s2 "
What is acceleration?
State all the facts about the object's motion:
xf = (15 m/s2)(5s)2/2 + (-10 m/s)(5s) + (3m)
Assume the right is positive
acceleration = 15 m/s2 (slowing down towards the right)
time = 5s
initial velocity = -10 m/s (moving towards the left)
initial position = 3m
An object with a velocity of 0m/s must have an acceleration of 0 m/s2
An object can have an acceleration in the opposite direction as the initial velocity. If the acceleration is constant, there will be a point where the object will slow down to a stop (v=0m/s) before changing directions.
The quantity described in the statement below:
"Camilla moved 3 meters away from her seat."
Choices: Position, displacement, velocity, acceleration, force, mass
What is "displacement"?
Create a short problem that can be described by the following equation:
100m= (a*(3s)s)/2 + (- 4 m/s)(3s) + (20m)
A car is moving towards the left at -4m/s. When the car is 20m away from the end of the road, it begins to accelerate the other way. If it reaches a position of 100m in a time of 3s, what is the acceleration of the car?
"When you throw an object upwards, it has an acceleration of zero when it reaches its peak"
If the acceleration is zero, then the speed isn't changing. If the speed isn't changing, the object will stay hanging in the air.
The UNIT for the quantity described in the statement below:
"Lizeth engages the brakes on her bike to slow down to a stop."
What is meters per second squared
Create a short problem for the equation below and solve for the unknown quantity.
200m = v*(5s) + 100m
If a tiger takes 5s to go from 100m to 200m, what is its velocity?
v= (200m - 100m)/5s = 20m/s