- #1
rashad764
Homework Statement
find the accleration at t=3 seconds
Homework Equations
vf-vi/tf-ti
The Attempt at a Solution
velocity at 3sec is 2 m/s and at 0 sec is at 4m.s
time is 3-0
2-4/3-0, [/B]
rashad764 said:1. The problem statement, all variables and g iven/known data
View attachment 210424
find the accleration at t=3 seconds
Homework Equations
vf-vi/tf-ti
The Attempt at a Solution
velocity at 3sec is 2 m/s and at 0 sec is at 4m.s
time is 3-0
2-4/3-0, [/B]
is it suppose to be -2?Ray Vickson said:Your answer of ##2 - \frac{4}{3} - 0 = 0.66667## is incorrect. Even if you put in parentheses (which you should always do) you would get ##(2-4)/(3-0) = -0.66667##, which is still incorrect. Can you see where your error lies?
You tell me.rashad764 said:is it suppose to be -2?
well since the line is going downwards, it has to be negative velocityRay Vickson said:You tell me.
rashad764 said:velocity at 3seconds is 2 and at 0 seconds its 4
time is 3 seconds minus 0
CWatters said:The acceleration at t=3 is the slope of the line at t=3. Does the slope start at t=0?
or look at it this way...
The slope/acceleration is the same at t=2.5 and 3.5sec right. Does your method give the same answer?
i was saying if the the velocity was -2 so it would be -2-4/3CWatters said:The problem is that in post #3 you just asked if the answer was -2m/s without showing your working. That's what Ray meant by you tell me.
The slope of an acceleration vs. time graph represents the rate at which the acceleration is changing over time. It can also be thought of as the acceleration's "steepness" or how quickly the velocity is changing.
To calculate acceleration from a graph, you can measure the change in velocity over a specific time interval and divide it by the change in time. This will give you the average acceleration for that time interval.
A horizontal line on an acceleration vs. time graph indicates that there is no acceleration, or that the object is moving with a constant velocity. This means that the object is not speeding up or slowing down.
A curved line on an acceleration vs. time graph indicates that the object is experiencing a changing acceleration. This means that the velocity is changing at a non-constant rate and the object may be accelerating or decelerating.
Yes, you can determine an object's initial velocity from an acceleration vs. time graph by finding the y-intercept of the graph. This represents the initial velocity at the start of the time interval.