Recent content by plane

this is the question: i have no idea how to start this, my initial thougts were to plug things into kinematic equations to get the acceleration but i really don't know. i know tangental acceleration is the derivative of the velocity equation, but i just don't know how to get the velocity...

yes! thank you.

ok, so today we had our calc midterm, and on it was this question: the limit as X->0 of (1-cosx)/(x^2) what i did was multiply the top and bottom with the conjugate of (1-cosx) which is (1+cosx). then i managed to factor out (sinx/x) twice. since (sinx/x) is just one, iarrived at the...

these equations relate to projectile motion, and i don't know which one of them to use for what kind of problem: yf=yi problems where they are kicked on level ground or those shot from a cliff. which one of these equations do use when? and for what type of problems?

Help Me Please! i've noticed there are three formulas for displacement in projectile motion: dx=vixt, dx=vixt+0.5gt^2 and vfx^2=vix^2+2ad (same for in the y direction). I am just confused as to when you use these three, can anyone please clear that up for me? thanks!

Need Help with this Question! i know it sounds simple but everytime i find myself lost. a projectile is launched with an initial speed of 22m/s 47deg above the horizontal from a 38m cliff, determine the displacementof the object 2.1s into its trajectory. do i find the displacement using...

i rearranged it, the computer messed them all up. how does it look now?

i have done some work on this question and was wondering if i have done it right. i would appreciae corrections if I am wrong or atleast mistakes being pointed out. thanks. two small blocks each of mass 4.0kg are connected by a string of constant length 120cm and negligible mass. Block A is...

challenging question! think you're smart enough? here is a very good questioninvolving inclines and projectile motion. please answer in full show your work and answers. A small mass m1=2.0kg, sits on a frictionless incline attached to a heavy mass m2=10kg. when the system is released, m2...

thanks i get it now

you have written an expression for FTy, but i need Ftx, is Ftx the same formula that being: Ftsin15=Ftx=m(ax)?

your attachment is pending approval, as for Ft i have no idea how to get an expression for it.

i always thought sine was the vertical componenet, when resolving vectors and i think that's true. also it doesn't give me the mass so how can i get an expression for Ft? can you please show me how?

so this is what id be doing: Ftcos15= Ftx Ftsin15= Fty and then Ftx= m(ax)? then what do i substitute? the time comes from: accelerates to maximum speed, which takes about 18s. what is the maximum speed of mary's moped? the question gives it to me

how? it only gives me the angle and the time, no forces or mass of the watch.