W 1. A 20.0-kg block is pushed eastward from rest along a horizontal. frictionless surface with a horizontal force given by the graph below. [4 mark] a} How much work is done in moving the block the first 6.00 m? b} What is the block's kinetic energy after it has moved 8.00 m? c} What is its velocity at the 3.00 m mark? forum] In \\D GFMMHU'Q'UI 01?]45518010 Distlncnm] 2. A spring bumper. with a force-compression relationship given by F = (40.0 Ntmlx. is compressed 3.00 cm. [4 mark] a} What elastic potential energy is stored in the spring at this compression? in} The spring is compressed further to 3.00 cm. What is the change in elastic potential energy? c} A 0.000-kg cart is placed against the compressed spring in part b on a horizontal. frictionless plane. The system is released. With what speed does the can leave the spring? 3. A 0.1?-kg hockey puck is sliding along a smooth. at section of ice at 25 We when it encounters some snow. After 2.0 seconds of sliding through the snow. it returns to smooth ice. continuing at a speed of 16 mls. [4 mark] a} What is the change in the momentum of the puck? b} What impulse does the snow exert on the puck? c} What average frictional force does the snow exert on the puck? 4. A 35-kg object moving to the right with a velocity of 4.0 ms collides with a 1?-kg object moving to the left at 5.0 mils. Find the velocity of the 35-kg object after the collision if a} The 17-kg object continues to move to the left but at only 0.50 mts [4 marks] b} The 17-kg object rebounds to the right at 0.55 mas o} The 17-kg object sticks together with the 35-kg object 5. A truck of mass 3.0 x10\" travelling at 25 ml's [55\" E of S] collides with a second truck of mass 1.4x10'. The collision is completely inelastic. The trucks have a common velocity of 13 ml's [25" E of 5] after the collision. [4 marks] a} Determine the initial velocity of the less massive truck in} What percentage of the initial kinetic energy is lost in the collision between the trucks