Praxis General Science: Mechanics Chapter Exam

Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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Question 1 1. A ball on a string in uniform circular motion has a velocity of 8 meters per second, a mass of 2 kilograms, and the radius of the circle is 0.5 meters. What is the centripetal force keeping the ball in the circle?

Question 2 2. Which of the following terms is the rate of change of position of an object?

Question 3 3. What is torque?

Question 4 4. Which of the following is a full definition of uniform circular motion?

Question 5 5. In which of the following kinds of motion are the displacement, velocity and acceleration graphs sinusoidal in shape?

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Question 6 6. When a roller coaster is at the top of a loop, what is providing the centripetal force to keep it in that loop?

Question 7 7. A speed limit sign along a highway in Montana says 70 mph. This information on this sign is an example of

Question 8 8. A book sliding across a desk will come to a stop because of the force of _______.

Question 9 9. Without friction, ______ would not be possible on earth.

Question 10 10. An object moving in uniform circular motion has a constant _____, but a changing _____.

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Question 11 11. Which of the following is a velocity?

Question 12 12. Which of the following is considered a vector quantity?

Question 13 13. What is the name of the force that keeps an object in circular motion?

Question 14 14. Scalar is

Question 15 15. A car is moving in a circle of radius 3 meters at a speed of 30 meters per second. If the car has a mass of 3000 kilograms, what is the centripetal force on the car?

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Question 16 16. An object is in orbit around the Earth. What is the agent of the centripetal force keeping it in orbit?

Question 17 17. The book sliding across the desk is an example of _______ friction.

Question 18 18. You push on a factory door with a force of 5 newtons, at a distance of 10 meters from the hinge. Your friend pushes the door from the other side with a force of 10 newtons at a distance of 5 meters from the hinge. What is the overall torque you're applying to the door?

Question 19 19. Which of the following would be considered a scalar quantity?

Question 20 20. Which of the following terms is the rate at which the velocity of an object is changing?

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Question 21 21. A baseball being hit for a home run is an example of which kind of motion?

Question 22 22. What is motion?

Question 23 23. If it takes 25 N to push a car, the friction between the road and the car's tires is ________.

Question 24 24. You push on a door with a force of 5 newtons, at a distance of 0.5 meters from the hinge. What is the torque you're applying to the door?

Question 25 25. If a stationary object has a 5 Nm clockwise torque applied to it, add a 5 Nm counter-clockwise torque, how will the motion of the object change?

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Question 26 26. If a stationary object has a 10 Nm clockwise torque applied to it, add a 15 Nm counter-clockwise torque, how will the motion of the object change?

Question 27 27. If the centripetal force on an object moving in a circle suddenly turned off, what would happen to the object?

Question 28 28. Which of the following terms is the change in position of an object?

Question 29 29. In which of the following kinds of motion can an object have a constant speed and still be accelerating?

Question 30 30. What is a centripetal force?

Praxis General Science: Mechanics Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the yellow "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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