Recent content by sprinter08

Thank you. Now I see how to get the answer.

N=FG-Fty N= 343-78.2 N=264.8

Thank you for your explanation. It did help me to better understand the concepts. However, I am still confused as to how I got the number 71.5 in the equation, 168N-71.5/35 kg=a. I did something and did not write it down and can not remember what formula I used.

Homework Statement A student pulls on a rope attached to a box of books and moves the box down the hall. The student pulls with a force of 185N at an angle of 25.0 degrees above the horizontal. The box has a mass of 35.0kg and a mu between the box and the floor is 0.27. Find the acceleration...

so would I take 165 and multiply it by the weight of the chair (25 kg) to find static friction and multiply 127 by 25 to find kinetic friction?

Homework Statement A 25kg chair initially at rest on a horizontal floor requires a 165N horizontal force to set it in motion. Once the chair is in motion, a 127N horizontal force keeps it moving at a constant velocity. a.) Find the coefficient of static friction between the chair and the...

Homework Statement A helicopter is ascending vertically with a speed of 5.5m/s. At a height of 100m above the Earth, a package is dropped from a window. How much time does it take the package to reach the ground? Homework Equations delta y = Vot + 1/2at^2 The Attempt at a Solution...

Thank you!

well, I was just wondering if I were to take the square of the top and then divide it by the bottom, or if I divided the top by the bottom and then took the square root. I divided the top by the bottom, and then took the square root to get .57. But then I think I would need to multiply it by 2...

Oh, sorry, I misread your question I think. I'm not sure if I know how to figure that out.

Vo in this case would be zero, I believe...and if it would be zero, then it would eliminate the first part of the equation (Vot).

Homework Statement A kangaroo jumps to a vertical height of 2.8m. How long was it in the air before returning to Earth? Homework Equations delta y= Vot + 1/2at^2 The Attempt at a Solution I had to get t by itself so I rearranged the equation to say: t= delta y/.5(9.8) all under...

Homework Statement A world-class sprinter can burst out of the blocks to essentially top speed (of about 11.5m/s) in the first 15.0m of the race. a.) What is the average acceleration of this sprinter? b.) How long does it take her to reach that speed? Homework Equations The...

Thank you. That makes sense to me now.

I'm not sure if I exactly understand. I understand a little more than I did before. It is hard for me because my class does not use a book and we have one practice problem as our notes.