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Unformatted text preview: CHAPTER 1 CYU 1: (a) yes (b) no CYU 2: No. CYU 3: a, b, c, f CYU 4: No. CYU 5: b, d CYU 6: (a) 11 m (b) 5 m CYU 7: No. CYU 8: Yes. CYU 9: (a) The magnitude of is equal to the magnitude of . (b) The direction of is opposite to the direction of . CYU 10: Vector is perpendicular to vector . CYU 11: Vector points in the same direction as vector . CYU 12: and CYU 13: (a) is and is (b) is and is (c) is and is CYU 14: No. CYU 15: Yes. CYU 16: (a) and (b) and (c) and (d) and CYU 17: No. CYU 18: (1) CHAPTER 2 CYU 1: 0 m CYU 2: scalar quantity CYU 3: No. CYU 4: a CYU 5: due east, average CYU 6: Yes. CYU 7: No. CYU 8: c CYU 9: No. CYU 10: No. CYU 11: the rifle with the short barrel CYU 12: 1.73 v CYU 13: a CYU 14: b CYU 15: b CYU 16: b speed 8.0 m/s average velocity 2.7 m/s A y 0 units A x 12 units A y 12 units A x 0 units A y 0 units A x 12 units A y 12 units A x 0 units R y R x B y B x A y A x D B A B B B A B B B A B A B B B A B B B ANSWERS TO CHECK YOUR UNDERSTANDING CHAPTER 3 CYU 1: b CYU 2: c CYU 3: a and c CYU 4: (a) Yes; when the object is at its highest point. (b) no CYU 5: No. CYU 6: b CYU 7: (a) when the ball is at its highest point in the trajectory (b) at the initial and final positions of the motion CYU 8: Yes. CYU 9: Both bullets reach the ground at the same time. CYU 10: (a) The displacement is greater for the stone thrown horizontally. (b) The impact speed is greater for the stone thrown horizontally. (c) The time of flight is the same for both stones. CYU 11: No. CYU 12: Ball A has the greater launch speed. CYU 13: (a) (b) (c) (d) CYU 14: No. CYU 15: The two times are the same. CYU 16: (a) The range toward the front is the same as the range toward the rear. (b) The range toward the front is greater than the range toward the rear. CYU 17: swimmer A CHAPTER 4 CYU 1: b CYU 2: c CYU 3: d CYU 4: No, because two or more forces can cancel each other, leading to a net force of zero. CYU 5: c CYU 6: a and d CYU 7: b CYU 8: Yes, because the ratio of the two weights depends only on the masses of the objects, which are the same on the earth and on Mars. CYU 9: a CYU 10: d 60 m/s 40 m/s, 30 m/s, 70 m/s, CYU 11: No. CYU 12: a CYU 13: b CYU 14: c CYU 15: To pull, because the upward component of the pulling force reduces the normal force and, therefore, also reduces the force of kinetic friction acting on the sled. CYU 16: CYU 17: c, a, b CYU 18: a CYU 19: a CYU 20: b CYU 21: d CYU 22: No, because there must always be a vertical (upward) component of the tension force in the rope to balance the weight of the crate. CYU 23: c CYU 24: No, because the transfer described does not change the total mass being pulled by the engine. CYU 25: a CHAPTER 5 CYU 1: (a) The velocity is due south and the acceleration is due west....
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- Spring '09