Recent content by agargento

Oh wow, I don't know why I did that. I got all the answers now, thanks!

Homework Statement A 2.9-kg particle P is located at [(r)\vec] = 3.3 m [^(x)] + 1.8 m [^(y)] from the origin of the x-y coordinate system shown in the Figure. It moves with a velocity of [(v)\vec] = −4.1 m/s [^(x)] + 2.6 m/s [^(y)]. A force, [(F)\vec] = 2.7 N [^(x)] + 1.4 N [^(y)] acts on the...

Homework Statement A power plant burns coal and generates an average of 700.0 Megawatts (MW) of electrical power while discharging 1162.00 MW as waste heat. Find the total electrical energy generated by the plant in a 30-day period. Homework Equations W = J/sec The Attempt at a Solution...

Now I understand, thanks!

Ohhh... So velocity has a direction and a quantity (Basically a vector) while speed is just a scalar, so when moving in a circle the velocity always changes, and that's the acceleration... ?

It is. But I calculated it's acceleration in 3. and 5.

x'(t) = -Rsin(ωt)*ω y'(t) = Rcos(ωt)*ω I know it should work but for some reason I can't get it to work... Edit: did a more accurate calculation, the change in speed is 0 m/s :D But now I'm a bit confused... I found the particle's acceleration... So how does the speed not change? Is it be...

Differentiate these two x(t) = Rcos(ωt) y(t) = Rsin(ωt) Get the speed for t=10 And then calculate the magnitude of |x'(t), y'(t)| Or are you asking to demonstrate it with numbers?

Homework Statement The motion of a particle moving in a circle in the x-y plane is described by the equations: r(t)=3.15, Θ(t)=8.86t Where Θ is the polar angle measured counter-clockwise from the + x-axis in radians, and r is the distance from the origin in m. 1. Calculate the x-coordinate...

Hey guys, sorry for disappearing, university's been rough. Anyway, me and a friend found a solution. I'll edit it in later. Thank you for all the help! Just wanted to let you know this is solved.

Yeah you're right. I tried to separate V0 from θ, but I think I missed the entire point completely.

Well I started doing it and got some really insane equations... What exactly should I differentiate? I'm very confused.

6... Which is 2n-2n-k

What do you mean by that? What's the difference?

Make an equation that's equal to V0 and then differentiate with respect to cos(θ)?