PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton Physics Quiz FORCE Each question is multiple choice. Select the best response to the question by

Quiz by Dr. John Dayton

PREVIOUS QUITNEXT START

SLIDE

Physics Quiz

FORCE

Each question is multiple choice. Select the best response to

the question by pressing the button to the left of your choice.

If your answer is correct, you will hear an applause.

Use the forward and backward buttons at the lower corners

of the slides to advance questions.



SLIDE

1. The SI unit of force is the __________ .

C. erg

D. newton

A. joule

B. dyne



SLIDE

2. Which of the following is not a force?

C. The normal

D. weight

A. tension

B. Coefficient of friction



SLIDE

3. In a system of interacting objects, the sum of all interactions (internal forces) is __________ .

C. always the net, non-zero, force on the system.

D. never zero.

A. always zero.

B. sometimes zero.



SLIDE

4. In the equation F=ma, the "F" represents __________ .

C. the magnitude of the net internal force acting within the object.

D. the vector sum of the internal forces acting within the object.

A. the vector force acting on the object.

B. the magnitude of the net force acting on the object.



SLIDE

5. Force is a __________ quantity.

C. pseudo

D. scalar

A. vector

B. tensor



SLIDE

6. If an object is in free-fall, what is the reaction force to the object`s weight?

C. this is an example of an exception to Newton`s laws of motion.

D. air resistance

A. the force of impact when the object strikes the ground.

B. the force of gravity pulling upward on the earth as earth interacts with the object.



SLIDE

7. Static friction exists when __________ .

C. two objects would slide across each other if static friction were not applied

D. the normal force pushing up from the surface is non-zero

A. an object slides uniformly across the surface of another object

B. the normal force pushing up from the surface is zero



SLIDE

8. The force of gravity between two objects is directly proportional to __________ .

C. the sum of their masses

D. the square root of the sum of the squares of their masses

A. the distance between their centers of mass

B. the product of their masses



SLIDE

9. A reference frame can only be an inertial frame if it is not moving.

A. TRUE

B. FALSE



SLIDE

10. Your apparent weight (what you "feel") is actually the magnitude of the normal force from the surface of which you are in contact.

A. TRUE

B. FALSE



SLIDE

11. The acceleration of a body is inversely proportional to the magnitude of the net external force acting on the body.

A. TRUE

B. FALSE



SLIDE

12. The sum of all internal forces with a system of objects is zero.

A. TRUE

B. FALSE



SLIDE

13. Two unequal masses attracted by their mutual gravitational force accelerate toward each other with equal accelerations. (Assume no other forces are acting.)

A. TRUE

B. FALSE



SLIDE

14. In the absence of a net external force, the center of mass of a system of objects maintains a state of uniform motion.

A. TRUE

B. FALSE



SLIDE

15. The maximum value of static friction between two surfaces is determined by two factors: the roughness of the surfaces, and how strongly they are pressed together.

A. TRUE

B. FALSE



SLIDEThis is the last question of this quiz.

16. The force of tension, at any point along a "massless" rope, acts __________ .

C. equally in both directions

D. is zero except at the endpoints of the rope

A. toward the object with the greater pull

B. perpendicular to the rope

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PREVIOUS QUIT NEXT START SLIDE Quiz by Dr. John Dayton Physics Quiz FORCE Each question is multiple choice. Select the best response to the question by