# Word problem- moving object

1. Oct 10, 2011

### physicsgurl12

1. The problem statement, all variables and given/known data

An object is moving to the right, and experiencing a net force that is directed to the right, The magnitude of the force is decreasing with time. the speed of the object is: constant or increasing??
2. Relevant equations

none?

3. The attempt at a solution
constant??

2. Oct 10, 2011

### I like Serena

3. Oct 10, 2011

### physicsgurl12

increasing wasn't it?

4. Oct 10, 2011

### I like Serena

Uhh... :uhh:

I don't remember.

Why would it be increasing?

5. Oct 10, 2011

### physicsgurl12

because theres acceleration.

6. Oct 10, 2011

### I like Serena

Aaaaah, yes. :)

Well, this time it's about a force.
Do you know the relation between acceleration and force?

7. Oct 10, 2011

### physicsgurl12

force equals mass times acceleration

8. Oct 10, 2011

### I like Serena

Good!

So we have an object moving to the right.
In which direction is the force/acceleration?

9. Oct 10, 2011

### physicsgurl12

the right

10. Oct 10, 2011

### I like Serena

Yep!

Do you also know the relation between acceleration and speed?

11. Oct 10, 2011

### physicsgurl12

acceleration is the change in speed?

12. Oct 10, 2011

### I like Serena

Yes. To be exact: acceleration is the change in speed per unit of time.

Soooooo?

13. Oct 10, 2011

### physicsgurl12

sooo. its increasing?

14. Oct 10, 2011

### I like Serena

Maybe...
Why would it be increasing?

15. Oct 10, 2011

### physicsgurl12

um because its accelerating?

16. Oct 10, 2011

### I like Serena

Yes, yes.
I think I've dragged this out long enough.
Yes, accelerating means speeding up.