Recent content by hakojackie

nevermind I give up my homework is due.

ok I know how to do that. What i need help with is how to do the problem I need a mass or some other number to put into my table so I can use sin and cos.

48 is what is left from the right triangle. My teacher did an example similar to this in class and she said the angles were the same.

42 degrees?

Yes that is what I have

yes I labeled them with the name of the force but I have no values.

I do have a picture I am using the ground as my x-axis the normal force is perpindicular to the slide the wieght of the child is perpendicular to the ground and the friction is the opposite direction in which the child is sliding down the slide. I don't know how to make a picture like that

I think I understand what you mean by a force balance. (find each force and break it into its components) but with the only numbers being 42 degrees and .2 i am not sure how to find the components. I would use sin and cos but I don't know what to use as the magnitudes.

At a playground, a child slides down a slide that makes a 42° angle with the horizontal direction. The coefficient of kinetic friction for the child sliding on the slide is 0.20. What is the magnitude of her acceleration during her sliding? Ok so I tried to use the equation ax=-Uk*g to find the...

The formula you want is Fmax=Us*Fn where Fs is what you are trying to find and Us (meu) is the coefficient of static friction and Fn is normal force

I think you should use 0 as your angle if that doesn't work then use 180. The reason I say 0 is becasue vectors can be moved around the X/Y coordinate system. You always use cos to find the X component and sin to find the Y component.

I got the answer finally the initial velocity for Y is 0m/s. I knew that is where I was going wrong but I still don't really understand why it is 0.

I think you could still use sine and cosine. Did your teacher give you the magnitude of anything if he did then you would take the magnitude times cosine of zero for X since your vector lies on the X-axis. If 60 is the vertical direction's (Y) magnitude then you would take that times sine of...

Vector subtraction is kind of a fancy way of saying that you can add two vector distances even if they are going opposite directions. The subtraction part just means that they want you to look at which direction the vectors are going. The resultant vector is the addition of the the two...

The problem states; A projectile is fired horizontally with an initial speed of 50m/s. neglect air resistance. What is the magnitude of the displacement of the projectile 3 seconds after it is fired? What is the speed of the projectil 3 seconds after it is fired? I used this equation to get my X...