Recent content by michaelgtozer

Thanks!

So when i put the first 2 equations in the 3rd i get 80 - 1.2t^2 - 2.3t^2 = 24 -3.5t^2 = -56 t^2 = -56/-3.5 t= sqrt(56/3.5) t = 4

Okay so the equation for the motion of R motorbike is R(t) = 80m + 0 - 1/2(2.4m/s^2)t^2 Now that I have all 3 equations but i do this: x_L(t) = 0 + 0 + 1/2 (4.6m/s^2)t^2 ----> is equal to t^2 = x_L(t)/2.3 So when I combine that equation and x_R(t) - x_L(t) = 24m the final equation should be...

So the two equations I have now are: R = 1/2at^2 L = 80 - 1/2at^2 so for the third equation i think it would look something like this.. R = 80 - (24+L), so it would simplify to R = 56 - L i think.. From this would i solve R for t^2, then put in the t^2 in the L equation, then solve the 3rd...

Okay so i changed the variables to R and L, also changed the sign of the acceleration in the L equation to a negative. Any hints on what I should do next? Still very confused.

So far I have this: I started with both bikes on the x axis: bike x starts at 0m bike y starts at 80m equation for bike R is R: = 1/2at^ equation for bike L is: L = 80 - 1/2at^2 so i know both accelerations, and I am trying to solve for time, but i still have 2 unknown values of x and y... So...

That seems to be where I am having the trouble. I can't see how I can use the equation from part two get to the answer of 3.5s. When i look at the equation I see that it only allows me to put in 1 acceleration when the problem is giving me two to work with.

Homework Statement Two stationary motorbikes at time 0s are separated by distance of 80m. Both motorbikes accelerate at a constant rate as the travel towards each other. Motorbike X accelerates at a rate of 4.6m/s2 . Motorbike Y accelerates at a rate of 2.4m/s2 . Calculate the amount of time...

given P(-1,1,2), Q(-3,0,4), R(3,2,1), find an equation of the line through P that is parallel to the line through Q and R. All the words after the given three points really confuse me and I just need some help on where to start to tackle this problem. Thanks