The force shown is applied to a metal block of weight 200 N in contact with a smooth wall. What is the minimum magnitude of the applied force A car of mass 1500 kg and travelling at 5.0 m/s [east] accelerates for 10 s to a velocity of 24 m/s [east]. What is the net force on the car? needed to prevent the metal block from sliding down the wall? (3.6 x 103 N [east] O2.9 x 103 N [east] 04.4 x 103 N [east] 07.5 x 102 N [east] 400 N 200 N 13. It takes a force of 64 N to start a 4.0 kg copper block sliding on a dry horizontal copper rail of mass 8.0 kg. What is the coefficient of static O 20.0 N friction for these copper surfaces? 01.6 O 100 N O0.61 10. Use the following information to answer the next question. + 650N O0.82 30.0 O 1.2 25 09 * 50.ON 11. The magnitude of the minimum force required for an 80.0-kg cross- country skier to start moving across a horizontal surface covered in dry snow (Us = 0.0600) is N. (Record your three-digit answer.) Direction of Motion In the diagram above, the total horizontal force moving the object Your answer: forward, expressed in scientific notation, is a.bc x 10 N. The value of a, b, c, and d, respectively, are (Record all four digits answer) 12. Consider the coefficients of static friction, Us. and of kinetic friction, Uk. for a wood block on a rough, horizontal surface made of the same kind of (Record your answer in the numerical-response section below.) wood. Which of the following statements is correct for most surfaces for Your answer. DOO these coefficients of friction? us > HK > 1 O us > HK Hs