How Do I Interpret This Graph for Homework?

[sidt36]

Homework Statement

So should i take the area under the graph or something

Homework Equations

And is in the future i Tackle such problems what are the key thing to remember[/B]

The Attempt at a Solution

Tried subtracting the areas no use xd[/B]

 

[SteamKing]

Homework Statement

So should i take the area under the graph or something

Homework Equations

And is in the future i Tackle such problems what are the key thing to remember[/B]

The Attempt at a Solution

Tried subtracting the areas no use xd[/B]

Well, what do you know about how force relates to the motion of an object?

Trying random things with a graph rarely leads to anything useful, unless you know something about the physics of what is going on.

 

[sidt36]

Well i know that Force * time leads to mass delta velocity

 

[haruspex]

Have you done any work with integrals and areas? Integrals and force, momentum and time?

 

[SteamKing]

Well i know that Force * time leads to mass delta velocity

And what sort of calculations did you do with this knowledge, using the graph as a source of data?

 

[sidt36]

I added up the areas of the triangle and tapezium

 

[sidt36]

And i have not done integrals. I have to solve it with a 9th graders knowledge

 

[SteamKing]

I added up the areas of the triangle and tapezium

Can you share these calculations?

 

[sidt36]

As much as i can do

 

[SteamKing]

As much as i can do

Everything looks OK with your calculations, you just need to put them together.

For the first part of the calculation, you are told that the toy car is at rest initially, so this means that v(t) = 0 m/s when t = 0 sec.

What would be the velocity of the car after 4 seconds, using your figures for the change in velocity?

Don't forget to use the mass of the toy car!

 

[sidt36]

Yup got it 6.5 i cap is the answer