Distance using acceleration and time

  • Thread starter Thread starter mattykay
  • Start date Start date
  • Tags Tags
    Acceleration Time
AI Thread Summary
A car accelerates from 15 m/s to 28 m/s over 6.4 seconds, and the acceleration is calculated to be 2 m/s². The main challenge is determining the distance traveled during this time, with various incorrect attempts yielding results of 44, 41, 19, and 83 meters. The correct approach involves using the average speed formula or kinematic equations, specifically d = ((vf + vi)/2) * t or d = ut + 1/2 at². Clarification on the use of these formulas helped identify the correct method for calculating distance. Understanding these concepts is crucial for solving similar physics problems effectively.
mattykay
Messages
2
Reaction score
0

Homework Statement


A car accelerates from 15 m/s to 28 m/s in 6.4 s. How far did it travel in this time?

Homework Equations


Unsure- have tried several, and all results have been wrong
Part 1 was to determine acceleration, which is 2 m/(s^2)

The Attempt at a Solution


I've come up with 44, 41, 19, and 83 meters, all of which have been wrong.
 
Physics news on Phys.org
mattykay said:
Part 1 was to determine acceleration, which is 2 m/(s^2)
Seems OK

The Attempt at a Solution


I've come up with 44, 41, 19, and 83 meters, all of which have been wrong.
Show what you've done.

There are several ways to solve this. One way is to use the average speed.
 
Do you know your kinematic equations?

Alternatively, if you plot a v-t graph, do you know how to obtain the distance traveled from that graph?
 
I got it; I was using one formula, when I should have been using d=((vf+vi)/2)*t
 
Using d=ut + 1/2 at2 should have given the same answer.
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
View full post »

Similar threads

Relating acceleration to distance and time
Replies
5
Views
3K
Solving for Work Done When Accelerating a Mass
Replies
3
Views
778
Will The Cars Stop In Time? - Check My Work Please :)
Replies
13
Views
1K
Calculate gravitational acceleration without mass of both objects
Replies
1
Views
2K
Finding linear acceleration of a spool and cable
Replies
6
Views
2K
Help with question on motion: Avoiding a rear-end collision
Replies
6
Views
3K
Question about Projectile Motion: Throwing a Flower Pot from a Balcony
Replies
18
Views
1K
Verifying the acceleration of gravity in our lab (help with error please)
Replies
7
Views
2K
Why would this be accelerating positively?
Replies
6
Views
963
Irodov 1.23 confusion: Calculate distance traveled and time elapsed for this decelerating particle
Replies
2
Views
863

Hot Threads

Recent Insights

Back
Top