Homework Help: Motion Displacement Problem

1. Mar 2, 2013

tarun766

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

2. Relevant equations

3. The attempt at a solution
No attempt :(

2. Mar 2, 2013

RobLikesBrunc

1. Write down the equation that describes the displacement (distance in this problem) of the Canadian skier and then the Norwegian skier.

2. What does it mean (think in terms of the above equations) for the Canadian skier to overtake the Norwegian skier? What condition must be satisfied?

3. Mar 2, 2013

tarun766

1. d2-d1?

2. The canadian skier has a parabola as its position time graph and the norwegian one has a diagonal straight line starting at 1m on the y axis.

Could you explain the solution?

4. Mar 2, 2013

RobLikesBrunc

I have no idea what d2 and d1 are.

As for 2, you didn't really answer the question. The Canadian skier overtakes the Norwegian skier when they've gone the same distance.

What equation describes the distance that the Canadian skier has gone in some time t? And what equation describes the distance that the Norwegian skier has gone?

5. Mar 2, 2013

6. Mar 2, 2013

RobLikesBrunc

If you still can't even attempt the problem after what I've told you, you need to go back and actually learn the material.

The displacement of the Canadian skier is given by:

$$x = x_{0} + v_{i}t + \frac{1}{2}at^2$$.

The displacement of the Norwegian skier is given by:

$$x = x_{0} + v_{i}t$$.

You do the rest.

7. Mar 3, 2013

tarun766

Could you please write a solution? I still am not getting the correct answer.