Q3) Forces and Friction: A man is pushing a box that has a mass of m = 3 g on a horizontal warface. He applies a horizontal force (F) to the his. The coefficient of static friction between the floor and the box (#,) in Q.15 and the coefficient of kinetic friction, (#, ) is 0.1, (20 polais) ") Draw a free body diagram for the box bj Find the normal force acting on the box c) If the applied force is $N, will the object move? What is the minimum force necessary to make the object move? Show your work dj When you apply a force of 10 N. find the acceleration of the object. (Remember now things are moving). (4) Statles, torques and conservation of energy: A solid rectangular box (A) and a square box (B) is kept on a secsaw wuch that they are in a static equilibrium. The rectangular box (A) has a mass off 10 kg (Figure I) A Figure 1 Figure 2 a) Draw an extended Freebody diagram for the seesaw. bj Ifr, = 2.5m and if ry = 3 m, find the mass of the square box (B) c) Then a second square box (B) is placed on top of the first box (without a change in position). Now the seesaw is not in equilibrium. Find the net torque acting on the seesaw. d) Due to the net torque the seesaw slants to one side making the rectangular box (A) slide to the right. The vertical height change of the box (A) is 2m. Using conservation of mechanical energy find the velocity of the (A) box as it hits the other boxes