(6) Block 1 has a mass of 1.69 kg and block 2 has a mass of 6.38 kg. Block 2 is released from rest at a height of h = 1.20 m above the floor. 2 (a) Find the speed of the 6.38 kg block just before it hits the floor, if there is no friction. Submit Answer | Tries 0/10 (b) Find the speed of the 6.38 kg block just before it hits the floor if the coefficient of kinetic friction of the 1.69 kg block is 0.406. Submit Answer Tries 0/10 (7) A particle of mass 4.78 kg is released from rest at point A (the highest point) and slides on the frictionless track shown in the figure where ha = 4.83 m, ho = 3.08 m, and hc = 1.40 m. A B he (a) Determine the particle's speed at point B. Submit Answer Tries 0/10 (b) Determine the net work done by the force of gravity in moving the particle from A to C. Submit Answer Tries 0/10 (8) (a) A block of mass 2.10 kg is pushed 2.05 m along a frictionless horizontal table by a constant 17.7N force directed 23.60 below the horizontal. Determine the work done by the applied force (in Joules).(8) (a) A block of mass 2.10 kg is pushed 2.05 rn along a frictionless horizontal table by a constant 17.7N force directed 23.6 below the horizontal. Determine the work done by the applied force (in Joules). m Tries 0/10 (b) Determine the magnitude of the normal force exerted by the table. m Tries one (C) Determine the magnitude of the force of gravity. SubmilAnswer Tries 0/10 (d) Determine the magnitude of the net force on the block. Submit Answer Tries 0/ 10 '1! i (9) On a frozen pond, a 10.7 kg sled is given a kick that imparts to it an initial speed of v0 = 2.10 m/s. The coefcient of kinetic friction between sled and ice is pk = 0.127. Use the work kinetic energy theorem to nd the distance the sled moves before coming to rest. Submit Answer Tries 0/10 11! 0 (10a) A block of mass 2.1 kg is attached to a spring with spring constant 489 N/m. The block is pulled to a position 5.81 cm to the right of equilibrium and released from rest. Find the speed the block has as it passes through equilibrium if the horizontal surface is frictionless. m Tries 0/10 (10b) Find the speed the block has as it passes through equilibrium if the coefficient of friction between block and surface is 0.242. SubmilAnswer Tries 0/10 a a (11a) A 51.0 kg student climbs a 6.75 m long vertical rope and stops at the top. What must her average speed be in order to match the power output of a 100 W lightbulb? :} Submit Answer Tries 0/10 (11b) How much work does she do? Assume velocity is constant. : m Tries 0/10 '3! 0 (12) (a) A 0.570 kg particle has a speed of 2.25 m/s at point A and kinetic energy of 7.64 J at point B. What is its kinetic energy at A? :1 m Tries 0/10 (b) What is its speed at point B? SubmitAnswer Tries 0/10 (c) What is the total work done on the particle as it moves from A to B? :] Submit Answer Tries 0/10