Question

test rocket is launched, starting on the ground, from rest, by accelerating it along an incline with constant acceleration a. The incline has length L, and it rises at θ degrees above the horizontal. At the instant the rocket leaves the incline, its engines turn off and it is subject only to gravity, g≡+9.81m/s2. (Air resistance can be ignored).

Taking the usual x-y coordinate system, with an origin at the top edge of the incline,

(a) what is the position vector when the rocket is at its highest point?

Answer 1

Usually when I approach physics questions, I draw out the diagram first, write then my givens, and then figure out which equations to use.

Answer 2

And acceleration is 0 at the peak isn't it?

Answer 3

I'm confused with my knowns and unknowns.

Answer 4

Tbh, the only value is the constant, g. At least that you've given.

Answer 5

I am supposed to write out my answer in terms of the variables a, L, theta, and g. You're right.

Answer 6

I see.

Answer 7

what is my velocity at the beginning and end?

Answer 8

I think you have to split this question into 2 parts, at the beginning, and at the end. I might be interpreting that incorrectly.

Answer 9

As for equations to use, I think the 5 kinematic equations are to be used here.

Answer 10

I think the speed in the x-direction will be constant, so all have to figure out in in the y direction.

Answer 11

I think your intial velocity will not be 0. Not sure.