Recent content by Tyrannosaurus_

Wow! Thanks for the helpful reply! Very helpful! I solved it a little while ago in a similar way to you: For ball 1, H(t) = 67m - 1/2gt^2 For ball 2, H(t) = 20t - 1/2 gt^2 Then set, H(t) = H(t) and solved for t. Found the same result as you, i.e., t = 67/20 s Thanks for the help...

Hi ZapperZ, I've drawn sketches on my notes, but can't draw in this box. Moreover, I've posted images of my solutions before and have been in "trouble" for not following the template. Thanks for your "help" though ZapperZ - lol!

Thanks for the suggestion PeroK! That will work for me. I'm really curious why I can't find an algebraic solution though. Should my original equation look like: -d1 + d2 = 67 m? I suggest a negative displacement for ball 1 as it is moving down, and ball 2 is moving up. I've set up as +...

Thanks for the help PeroK. I understand where you're coming from, but do you see why I have a negative value for c. It's from d1 + d2 = 67 m. It's really the purpose for my OP, how can I understand that initial statement in a better way so that I can find the place where the two balls collide.?

Thanks for the help everyone. I neglected the negative sign for g by mistake. When I use -9.8 in the quadratic formula, I get a negative radical/under the root. So, I suspect the dilemma is in the setup. I have considered acceleration - it's g as there is no air resistance. All equations...

Sorry, that's a typo when I subbed the speed for the car. It should be as stated, the 80 km/h. Do you think it's okay that I set the sum of their displacements to 20 km? Also, should I subtract their velocities (they're act in opposite directions) when common factoring the time, t?

Homework Statement Ball 1 falls from rest from 67 m up. Directly 67 m below, ball 2 has 20 m/s [up]. No air. Where do they meet? Homework Equations non-uniform motion, so key kinematics equations. The Attempt at a Solution d1 + d2 = 67 m <--- is this okay to do? v1i *t + 1/2 a *t2 + V2i...

Homework Statement On a North-South highway, a Car drives 80 km/h [N]. A SUV, that is north of the Car, is moving 70 km/h [South]. The car is to the south of the SUV. The two are separated by 20 km. Where are the two cars when they pass each other. Homework Equations Both are in uniform...

Elegant & Exact. A sincere Thank You!

Thanks for the reply! I do appreciate your help, and support. I understand similar triangles. I am looking for a relationship that is simple to communicate with students. Currently, I use a physical model with a weighted string, & some cardboard arrows to show the x & y axis. All help &...

Please show me the relationship that proves how an inclined plane's angle of incline, θ, is equal to the angle used to find the components of gravity force. I know that the angles are the same, but I'd like a way to show it. Thanks!

Thanks so much! I was going crazy!

Homework Statement The planet Saturn will orbit the Sun every 19 Earth years (= 599 184 000 seconds). Assume Saturn travels on a circular orbit with a speed of 9 690m/s. What is the radius of the orbit of Saturn? I can solve this in two different ways, and get two different values. Which is...

So, like I said, "how do I find the value?" Thanks for your effort. In the future, save both of our time by confirming my solution. Ek cat is unknown! It might be expressed in terms of Ek mouse, but Ek cat's value is, like I asked, not possible to be found.

The problem in part 1 is solved. The cat cannot catch the mouse. The cat's speed, whatever value in metres-per-second that may be, is only 83% of whatever the mouse's actual speed in metres-per-second may be. Part 2 cannot apply to Part 1 because they are totally distinct. In part two we've...