Recent content by sracks

I'm actually having trouble when x = 25 cm. Is there any advice on how to figure it out?

oh, thank you :-p

A particle has the potential energy shown in the figure. See link below. What is the x-component of the force on the particle at x =5, 15, 25, and 35 cm? All answers are in N http://img111.imageshack.us/img111/4988/figure2vn4.jpg i know i should be using -dU/dx but i keep getting the...

Got it Forget about this question. I got it

(.01kg)(9.8m/s^2)(47 m/s - 29m/s) = 1.7 I have a feeling that i am completely doing it wrong

Help Now I have another problem A 10 g particle is moving to the left at 29 m/s. How much net work must be done on the particle to cause it to move to the right at 47 m/s? W=mg\Deltar I got 1.7. I don't think I am doing this right.

A 1.1 kg book is lying on a 0.80-m-high table. You pick it up and place it on a bookshelf 2.17 m above the floor. How much work does gravity do on the book? How much work does your hand do on the book? W=mgh (1.1 kg)(9.8 m/s^2)(0.8m)=8.6 The answers that I am getting are wrong...

Homework Statement The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 37 m diameter loop-the-loop. What is the car's speed at the top? Homework Equations n-mg=0 I don't know what equation to use The Attempt at a Solution I...

A 1.0 kg block is tied to the wall with a rope. It sits on top of the 2.0 kg block. The lower block is pulled to the right with a tension force of 20 N. The coefficient of kinetic friction at both the lower and upper surfaces of the 2.0 kg block is 0.40 (static friction). What is the tension...