Physics 2 2.0
At what rate does an object acceleration when dropped near Earth's surface? Does it change in amount or direction if object is thrown/dropped?
9.8 m/s^2 if thrown up, -9.8 m/s^2 if thrown down.
Horizontal line on velocity-time graph show about acceleration of object?
0
If the dots on a motion diagram are equally spaced, what is acceleration?
0
Initial velocity of any object dropped from rest?
0
Acceleration of upwardly thrown object at top of path/anywhere in path?
9.8 is acceleration anywhere.
Negative slope on a velocity-time graph show about motion?
Acceleration is negative, if object is going forward, speed decreases, if object is going backwards, speed increases.
Positive slope on a velocity-time graph show about motion?
Acceleration is positive, if object is going forward, speed increases, if object is going backwards, speed decreases.
Acceleration on v-t graph?
Flat line is constant, same means speeding up, different is slowing down.
Free fall means?
Motion of object is only affected by Earth's gravity.
What happens to an object that is at rest and then experiences a negative acceleration?
Move backward, speed up.
What happens to an object that is at rest and then experiences a positive acceleration?
Move forward, speed up.
If the dots on a motion diagram get close together, what is acceleration?
Negative
Can you have a completely vertical slope on a v-t graph?
No, it would have to have different speeds at the same time, impossible.
If the dots on a motion diagram get far apart, what is acceleration?
Positive
How does a car accelerate without changing speed?
Change direction.
Acceleration
Change in Velocity over time
Speed on v-t graph?
If acceleration and direction are the same, it speeds up, if acceleration and direction differ, it slows down. A flat line is constant.
Direction of motion on a v-t graph?
If velocity is positive, direction of motion is forward, if velocity is negative, direction of motion is negative, if velocity is at 0, direction of velocity is none.
What happens an object already moving backward and then experiences a negative acceleration?
It keeps moving backwards, but speeds up.
What happens to an object already moving backwards and then experiences zero acceleration?
It keeps moving backwards.
What happens an object already moving backward and then experiences a positive acceleration?
It moves forward, but slows down first.
What happens to the velocity of an object dropped as time doubles?
It quadruples.
What happens an object already moving forward and then experiences 0 acceleration?
Keeps moving forward.
Velocity of any upwardly thrown object at top of path?
Positive, negative if thrown down.
Velocity
Rate at which object changes position.
Speed
Rate at which object covers distance.
Acceleration
Rate at which velocity of an object changes.
What happens to an object that is at rest and then experiences no acceleration?
Remains at rest.
What happens to the distance and object falls when dropped as time doubles?
Remains same.
If an object is thrown up, how does the amount of time it takes to go up compare to the amount of time it takes to come down?
Same amount of time.
If you know initial vertical velocity of object thrown up what is velocity when it comes down to same point?
Same, but negative because it comes down.
What information can you obtain from a velocity-time graph?
Speed, direction, time, displacement, and acceleration.
What happens an object already moving forward and then experiences a negative acceleration?
Speeds up.
What happens an object already moving forward and then experiences a positive acceleration?
Speeds up.
Area under the line on a v-t time graph tell about the motion?
Velocity is negative.
Can acceleration be opposite velocity?
Yes, can throw a ball up with velocity positive and acceleration negative.
Standard metric unit for acceleration and for velocity, how do they differ
m/s^2 for acceleration, m/s for velocity, they are different because velocity is a displacement over time and acceleration is a change in velocity over time.