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# ch03-QZ - Cutnell/Johnson Physics 8th edition Classroom...

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Cutnell/Johnson Physics 8th edition Classroom Response System Questions Chapter 3 Kinematics in Two Dimensions Interactive Lecture Questions

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3.3.1. A bicyclist is riding at a constant speed along a horizontal, straight-line path. The rider throws a ball straight up to a height a few meters above her head. Ignoring air resistance, where will the ball land? Ignore any effects of air resistance. a) in front of the rider b) behind the rider c) in the same hand that threw the ball d) in the opposite hand to the one that threw it e) This cannot be determined without knowing the speed of the rider and the maximum height of the ball.
3.3.8. An airplane is flying horizontally at a constant velocity when a package is dropped from its cargo bay. Assuming no air resistance, which one of the following statements is correct? a) The package follows a curved path that lags behind the airplane. b) The package follows a straight line path that lags behind the airplane. c) The package follows a straight line path, but it is always vertically below the airplane. d) The package follows a curved path, but it is always vertically below the airplane. e) The package follows a curved path, but its horizontal position varies depending on the velocity of the airplane.

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3.3.11. Packages A and B are dropped from the same height simultaneously. Package A is dropped from an airplane that is flying due east at constant speed. Package B is dropped from rest from a helicopter hovering in a stationary position above the ground. Ignoring air friction effects, which of the following statements is true? a) A and B reach the ground at the same time, but B has a greater velocity in the vertical direction. b) A and B reach the ground at the same time; and they have the same velocity in the vertical direction. c) A and B reach the ground at different times because B has a greater velocity in both the horizontal and vertical directions. d) A and B reach the ground at different times; and they have the same velocity in the vertical direction. e) A reaches the ground first because it falls straight down, while B has to travel much further than A.
3.3.9. In making a movie, a stuntman has to jump from one roof onto another roof, located 2.0 m below. The buildings are separated by a distance of 2.5 m. What is the minimum horizontal speed that the stuntman must have when jumping from the first roof to have a successful jump? a) 3.9 m/s b) 2.5 m/s c) 4.3 m/s d) 4.5 m/s e) 3.1 m/s

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3.3.2. Football A is kicked at a speed v at an angle of l with respect to the horizontal direction. If football B is kicked at the same angle, but with a speed 2 v , what is the ratio of the range of B to the range of A? a) 1 b) 2 c) 3 d) 4 e) 9
3.3.3. Balls A, B, and C are identical. From the top of a tall building, ball A is launched with a velocity of 20 m/s at an angle of 45 above the horizontal direction, ball B is launched with a velocity of 20 m/s in the horizontal direction, and ball C is launched with a velocity of 20 m/s at an angle of 45 below the horizontal direction. Which of the following

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ch03-QZ - Cutnell/Johnson Physics 8th edition Classroom...

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