Physics Help! ¡Por favor!?

Question

A machine has an 760g steel shuttle that is pulled along a square steel rail by an elastic cord . The shuttle is released when the elastic cord has 16.0N tension at a 45º angle. What is its initial acceleration?

I would appreciate any help that could be offered. I don't really want an answer, just a push in the right direction.

Answer 1

Ok, no solving, just help.

The first response was pretty good and I am sure that he'd solve it -- you might need a touch more help. Are you doing vectors?

Start out looking at the force on the shuttle. There are three (3): The cord (at a 45 deg angle), (b) gravity, and (c) normal force of the rail (perpendicular to the rail).

However, for purposes of this problem, the normal force and the gravitational force, when combined will be a force in the opposite direction of the cord (how could they be otherwise, we know the shuttle will accelerated in a direction parallel to the the rail).

Using simple trig, you should now be able to get the resistive force caused by gravity in the direction of the rail.

Answer 2

ok, so to figure out the acceleration you need to know force and mass since acceleration=force/mass. you already have the mass. tension is a force. it tells you how much force is being used on the shuttle by the cord. but there is also the force of gravity to consider. because the force that you'll use to solve this will actually be the total force of the cord minus the force of gravity in the opposite direction. i'll let you try and figure out how to use the angle to get that, I can't give you all the answers - you wouldn't learn anything. Best advice---draw a diagram it makes it 100x easier.

Answer 3

a million. x=vt+a million/2at^2 Re-write this equation so as that it represents the vertical direction. v = x' = v + a million/2*2 * a * t v = v + a * t 2. Does gravity artwork horizontally? no, consistently vertical down. 3. Is gravity an acceleration or a rigidity? gravity is an acceleration. 4. in accordance on your answer in # 2 & 3, the numerical fee for acceleration interior the x-direction might opt to be what? 0 (0) 5. What does the vertical velocity do via making use of actuality the dart procedures the floor? vertical velocity is increasing. (uncertain what the question incredibly asks for...?) 6. If the dart starts off off horizontally, what do you think of of the preliminary vertical velocity is analogous to? 0 (0), via making use of actuality the vertical direction (sin) is 0 to make the dart initially flies horizontally. If no longer, mixed velocity will make the dart flies with an attitude downwards.