Question 1 (1 point) Consider a rocket travelling in a straight line for a small distance. Choose the correct formula(s) for expressing the work done by the rocket. O W: 3E}E O U": %m1' %mrf O '=nm_\\d 0 all of the above Question 2 (3 points) A 49 kg snowboarder descends a 0.90 km ski slope from the top of a mountain to the base as shown. The slope is at an angle of 14 to the horizontal. Determine the snowboarder's gravitational potential energy relative to the mountain base when she is at the top. ('1' mtg-('6 I Question 3 (1 point) Two particles have a perfectly elastic head-on collision. Particle 1 has mass 1.0 g and particle 2 has mass 9.0 g. Their velocities before the collision are and . Determine the velocities of the two particles after the collision. \"71 0 it\" = 0-10 m'ls [right]; Vi: = 6.8 m-"s [left] 0 Elm = 1-0 m'ls [1'31]; 7,: = 1.0 ms [tight] 0 itr1 = 6-8 "155 [left]; 7,: = 0 m-"s [right] 0 none of these Question 4 (1 point) One car has twice the mass of another. The heavier car is travelling at twice the speed of the lighter car. How many times more than the kinetic energy of the lighter car is the kinetic energy of the heavier car? Question 5 (1 point) A child with a mass of 15 kg runs at a horizontal velocity of 3.6 m/s [forward] and jumps onto a stationary tree swing of mass 3.0 kg. The child "sticks" on the tree swing and swings forward. What is the horizontal velocity of the child and swing? 54 m/s [forward] 6.6 m/s [forward] 2.9 m/s [forward] ( 2.7 m/s [forward] Question 6 (1 point) A 55 g mass is suspended from a vertical spring. What is the spring constant for this spring? - X= 0 Ax = 5.8 cm O 319 N/m 9.3 N/m OOO -9.3 x 104 N/m 3.2 x 102 N/mQuestion 7 (1 point) A block of mass 2.0 kg is travelling left at a speed of 2.0 m/s when it hits a spring placed horizontally as shown. If the spring constant is 500.0 N/m, calculate the maximum compression of the spring. 2.0 kg 3.9 cm 4.0 cm 0.20 cm O none of the above Question 8 (1 point) Aisha is pushing snow as shown with a force of 35 N at an angle of 40 to the ground. If she pushes the snow 2.0 m, how much work is done? ( 70 J ( 54 J ( 45 J ( 49 J