- #1
jdenn
- 6
- 0
Hi, I've got a big probllem:
HELP!
Please!
jason
When you are 20m away from your bus it begins accelerating a 3m/s/s (from rest). What constant velocity should you run at to catch the bus.
HELP!
Please!
jason
thats the think I have no idea where to beginTom Mattson said:Yep, you have to show that you've made an attempt.
i have drawn a picture, listed my formulas( no idea which 1 to use though)*melinda* said:Try drawing two pictures; the first showing the initial conditions, and the second showing the final conditions when you've caught the bus.
Once you've drawn the pictures, make sure you listed all your knowns.
List your kinematics formulas so you can see what you have to work with.
And don't forget to note your initial and final position.
Try choosing your initial position as zero, which would make the initial position of the bus 20 m.
ive been working more but all i have still is:thats the think I have no idea where to beginTom Mattson said:You have yet to make use of that 20m in the problem statement. Let the motion be along the x-axis.
Can you fill in the following information?
Runner: xi=?
Bus: xi=?
Constant velocity is the rate of change of an object's position over time, where the object moves at a consistent speed in a straight line.
This problem can be solved using the formula d = vt, where d is the distance, v is the velocity, and t is the time. Rearranging the formula to solve for t, we have t = d/v. Plug in the given values for d and v to find the time it takes to catch the bus.
It depends on the distance between you and the bus stop and the speed of the bus. If the distance is short and the bus is moving slowly, you may still be able to catch it. However, if the distance is long and the bus is moving quickly, it may be impossible to catch the bus if you start too late.
In this case, you would need to calculate the relative velocity between you and the bus. This can be done by subtracting your velocity from the bus's velocity. Then, use the same formula d = vt to find the time it takes for you to catch the bus.
Yes, this problem can also be solved using the formula v = (d2 - d1)/(t2 - t1), where v is the average velocity, d1 and t1 are the initial distance and time, and d2 and t2 are the final distance and time. However, this formula assumes constant acceleration, so it would not be accurate in the case of constant velocity.