Question

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4. During a football game, a 115-kg ball carrier brea-kg deften he tad loose and heads north back moves 5-kg ball carri pan at aspeed of 8.50 m/s. A 135-kg defensihen he tackles at an angle of 30.0° south of west with a sp and holds on to him. What is their velocity immi he eir velocity immediately after impact mpact? speed of 7.50 m/s a) 3.98 m/s b) 6.89 m/s c 3.51 m/s d) 7.96 m/s 11.3 m/s An object is in a simple harmonic motion, with displacement x (measured from its equilibrium position), velocity v, acceleration a, and amplitude A. Which of the following statements is correct? a) none of these b) When x 0, v is not equal to zero and a is equal to zero. c) ⓓ When x 0, neither v nor a is equal to zero when x = A, v is equal to zero, and a is not equal to zero. , when x-0, v and a are equal to zero. A spherically shaped balloon has a radius of 0.50 m, and is filled with helium. What is the mass of the skin of the balloon so that it can be suspended in the air. (the density of air is 1.29 kg/im3 and the density of helium is 0.179 kg/m3) kg. a) 0.09 kg b) 0.77 kg c) 0.68 kg 0.86 kg e)0.58 kg

Answer 1

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