Recent content by Lalo1985

For a body in movement to stop means there has been a change in its Kinetic Energy. Kinetic energy is given by 1/2mv(f)^2-1/2mb(i)^2, where m = mass of object, (f) is final speed, which is zero, and (i) is the initial speed at which the object is traveling. Therefore, the change in Kinetic...

Hi, I'm having trouble solving this problem: A woman attempts to push a box of books that has mass up a ramp inclined at an angle (alpha) above the horizontal. The coefficients of friction between the ramp and the box are (mu_k) and (mu_s). The force F applied by the woman is horizontal...

thanks, that makes sense now that I consider units.

Hi, I'm having the same problem. I have figured out parts A and B. For C, I have F = m*a, where a=2m/s^2. So, to find m I divide F (=171.24N) by a (=2m/2^2) to get 85.62 mkg. So, to find the weight in N, I'm trying to divide by the Earth's acceleration 9.8m/s^2 and get 8.74N. However, This is...