AYUDA Calcular el momento resultante de las fuerzas aplicadas a la barra AB, respecto al punto A, siendo F1=20N, F2=18N, F3=24N, F4=30N

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Ais useful when you need a simple machine to you separate two things. a. lever b. screw c. pulley d. wedge

Which of these questions might a character ask if the conflict is man versus self? a. which path should i take to better myself? b. which boulder will be too heavy for me to carry? c. which friend is going to ditch me today? d. all of the above