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Practice_Test_2

# Practice_Test_2 - 1 Practice test 2 1 Which of the...

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1 Practice test 2 1. Which of the following is a statement of the first law of motion? a. A force always produces motion. b. Unbalanced force is proportional to acceleration c. A force is necessary to change the state of rest or motion of an object. d. A force always changes the direction of motion of an object. 2. Which of the following is an example where the net force is zero. 3. Which of the following is true about the second law of motion? 4. A cement block of mass 5.2 kg is sitting on a floor. The magnitude and direction of the force exerted by the floor on the block is 5. What is the magnitude and direction of the force exerted by the block in question 4 on the floor? a. 5.2 N down b. 5.2 N up c. 51 N up d. 51 N down

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2 6. A force F produces an acceleration of 2.0 m.s -2 on a particle of mass m. What force will produce the same acceleration on a mass m/4? 7. A force produces an acceleration 2.0 m.s -2 on an object of mass 1.6 kg. What acceleration will the same force produce on a 400 g object? 8. A 1000 kg car traveling at 72 km.h -1 is brought to rest in a distance of 20 m. The force applied by the brakes is: 9. What is the acceleration produced by a 2 N force on a mass of 50 g? a. 30 m.s -2 b. 40 m.s -2 c. 50 m.s -2 d. 60 m.s -2 10. A force F is applied to a mass M. If twice this force (2F) is applied to three times the mass (3M), the ratio of the acceleration of the smaller mass to the acceleration of the larger mass is
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Practice_Test_2 - 1 Practice test 2 1 Which of the...

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