Recent content by darkmagicianoc

I know that this is way late in responding, but I figured I'd share the way that I solved the bus problem since I just figured it out myself (and stumbled upon this post for help). since there are a total of 120 ways that all 5 can be arranged in the line, we have to look at the different cases...

Thank you for all of your help!

I figured it out! You use the formula Vf= Vi + at to find the acceleration, then use the formula a(centripetal) = (v^2)/r. Then you find the acceleration by the formula: a = [(a^2) + (a(centripetal))^2]^1/2

I am still very lost! Can someone please further help me!

Ok. So do I use the kinematic equation: r(final) = r(initial) + Vi(t) +.5a(t^2)? When I do I get -2m/s^2. I know centripetal acceleration is (v^2)/r. But do I use the 13.89m/s (50km/h converted)?

I was wondering if someone could help me figure out what formulas to use solving this problem. My professor gave me the answer (as a way to check our answers) : 1.48 m/s^2 inward and 29.9 degrees backward The problem is: A train slows down as it rounds a sharp horizontal turn slowing from...

:smile: Thank you for your help! It worked!

:-p I think I know what to do now! Thank you for helping me!

Yes, that makes sense. So now that I know how to get the velocity (intermediate), Do I use that as the new Final velocity, put zero as the initial velocity, solve for time and then the distance (using 30.0 as the final distance) and then add the two distances together?

a = 9.8m/s2 xm = 30.0 m tm = 1.50s xf = 0.00 xi = ? where i = initial, f = final, and m = somewhere in between

Maybe using: Distance (final) = Distance (initial) + [Velocity(initial)] (time) + .5(Acceleration)(time)^2 to get original velocity, and then subtract (9.8 m/s2)(1s) till hitting zero, n adding that time to the 1.5 s, and then try solving for distance?

I am thinking that the Kinematic equations might be useful, but I'm not sure if they could be used, or which ones.

The problem reads: A freeley falling object requires 1.50s to travel the last 30.0 m before it hits the ground. From what height above the ground did it fall? If anyone can please help me with this problem, I would be very grateful. Thank you in advance for your time and effort helping me...

Thank you for your help! I took your advice and it worked perfectly! I really appreciate the time and effort you took to help me!

I need help with this problem using the kinematic equations. My professor gave me the answer to this problem and wants to know the steps to achieve this answer. This is the example: The driver of a car slams on the brakes when he sees a tree blocking the road. The car slows uniformly...