Question

1. A block with weight W = 30 N is on a flat horizontal surface. You pull to the right with a force F = 16 N. There is gravity present and the coefficient of friction is static = 0.4 and kinetic - 0.25. You are also pulling straight up with an applied force of 12 N. Now what are: The normal force N-_ the frictional force f- the net force on the block Foot and acceleration a = 2. You are pulling a 2.0 kg block (no friction) up a straight slope with length L=2.5 m inclined at 40° above horizontal. You are applying a force F = 30 N parallel to the slope and the block starts at rest at the bottom. What are: The normal force N - the work due to F: W= the change in gravitational energy AUgrav= and the final kinetic energy Kf 3. A frictionless and weightless pulley has a weightless rope running over it. Each end of the rope is attached to a spring and the springs are holding up a mass that weighs 60 N. Each spring holds up half the mass. Spring 1 has ki 100 N/m and spring 2 has k2=140 N/m. The springs are stretched by Xi = X2 and the potential energy in each spring is U = _ and U2 =

Answer 1

Please post the other questions separately. Thanks and good luck:)

F = 16. Fu = 120 W=30N sef FH Efy = 0 ary for w ns 18N fw-W=o FN a wh Fr - 30-12 18N) (Normal foru) f = M F = (0.25) (18) = 4.5 N Fuet - Fa fa 16-4.5 = I1.SN] Enet as found in the eye - 236ml)