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Unit 3 Quiz#3

Equations:

1. If an object is at equilibrium, then the object must

  1. be at rest
  2. be moving at constant speed
  3. be moving in the same direction
  4. have an acceleration of 0 m/s2.
  5. none of the above


Useful Web Links

Equilibrium and Statics (23 seconds)

 

2. If an object is at equilibrium, then all the individual forces which act upon it must be equal.

TRUE or FALSE


Useful Web Links

Equilibrium and Statics (23 seconds)

 

3. A 10-kg rock is moving through space (far from the influence of gravitational forces) at a constant speed of 1000 m/s. The amount of force required for it to maintain this state of motion is

  1. 0 N
  2. 100 N
  3. 1000 N
  4. 10000 N
  5. none of the above


Useful Web Links

Newton's First Law (10 seconds)

The Big Misconception (9 seconds)

 

4.Two strings are used to suspend a 2-kg object. The object is at equilibrium (see diagram at right). The resultant of all three forces would be closest to

  1. O N
  2. 10 N
  3. 20 N
  4. 28 N
  5. 48 N


Useful Web Links

Equilibrium and Statics (23 seconds)

 

5. On the following diagram, fill in all blanks and determine the acceleration (both magnitude and direction) of the object. Clearly show your calculation for the acceleration.


Useful Web Links

Resolution of Forces (22 seconds)

Net Force Problems Revisited (17 seconds)

 

6. For the above diagram, determine the distance which the object will be moved if these forces act upon the object for 2.0 seconds. The object is initially at rest. PSYW


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The Kinematic Equations (5 seconds)

Kinematic Equations and Problem-Solving (7 seconds)

 

7. Add at least two forces to each of the following three objects so that the objects will be at equilibrium. Each force which you add must either be horizontal or vertical. Clearly label their manitude and indicate their direction by a clearly drawn arrowhead.


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Addition of Forces (19 seconds)

Resolution of Forces (22 seconds)

Equilibrium and Statics (23 seconds)

 

8. A 10-kg object is pulled across a rough surface at a constant velocity of 0.5 m/s. Utilize Newton's second law and an understanding of vector resolution in order to fill in the blanks in the diagram below.


Useful Web Links

Resolution of Forces (22 seconds)

Net Force Problems Revisited (17 seconds)

 

9. Troy Ginometri, owner of the local floral shop, displays the sale of the month in the front window of his shop. The 20-kg flower pot is suspended by three ropes from the ceiling. The ropes make an angle of 30° with the vertical. Utilize a sketch and a trigonometric function to determine the tension in one of the ropes. PSYW


Useful Web Links

Resolution of Forces (22 seconds)

Equilibrium and Statics (23 seconds)

 

 

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Special thanks to lab assistant Carl Bobis for his assistance in converting quiz to HTML format.

© Tom Henderson, 1996-1999


Glenbrook South High School.

Last updated on 10/18/99.