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I1. Short Answer Questlons (40 pts. total) e a head-on colision. During the 11. Head-on Collision. (S pts)Alarge truck and ac collision which vehkcte experiences the greatest magnitude rge truck and a compact car hav car ) both the same d) it depends which is moving faster! the speed of your car. your stopping 12.Halt & halt. (5 pts.) All other things being equal if you halve t distance should decrease to about of its original value (d) 67% (a) 10% (b) 25 % (c) 50% (e) 96 % 13. Car Turning. (S pts)A cturns a corner at 50.0 applies to the car's tires is measured to be F. If the same car turns the same required centripetal forceis now. km/hr and the centripetal force that the road (a) 20F (b) 41, (c) 40 F (d) 60F (e)BD F 14. Falling Rock. (S pts.) A rock ts released from rest 10.0 meters above the ground. The gravitational potential energy of the rock is 100。! with respect to the ground Neglecting air when the rock ts 5.0 m above the ground, it's total mechanical ener is. (a)25.0 (b)75.o c)soo] (d) 100J e)Need the mass of the (e) Need the mass of the rock 15. Half& ha 5 pts) An asterod s caught in the gravitational field of a planet and the magnitude of the force of attraction is measured to be F. Ithe mass of the planet is doubled. the mass of the asteroid is doubled, and so the distance between the center of masses of the asteroid and planet, what will theravitational force now be, (a) still F (b) ½ F (c) ¼ F (d) 2 F (e) 4 F 16. Harmonic Motion. (5 pts.) A pendulum is a good example of harmonic motion. Which of the following do the oscillations of a pendulum do NOT depend on? (a) the length of the pendulum (c) the mass of the hanging weight (b) the gravitational restoring force (d) oscillations depend on all of the above 2M 17. Two-Cube Collision. (5 pts.) As shown above, two cubes slide towa each other on a horizontal frictionless surface. The speeds of the two cubes are identical, although initial directions are opp The mass of the cube on the right is twice that of the left. After the cubes collide they stick together. Wh is the combined speed and direction of the combined mass? Take motion to the right as positive. (a) ⅔v (b) ⅔ v (c)-mv (d)-Y) v (e) None are correct! osite. 18. Rotational Inertia. (5 pts.) A solid cylinder and a hoop have the same mass and radius. They are released at the same time and roll down a ramp without slipping. Which one reaches the bottom first? b) Hoop a) c) Cylinder Both reach the bottom at the same time

Answer 1

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