Newton's Laws : Quiz 2 Practice Questions

 

1. If a wooden block slides down an incline at a constant velocity, the force of friction must be equal to the
    force perpendicular to incline force parallel to incline weight of the block

2. Three forces act concurrently on an object in equilibrium. These forces are 10 N, 8N, and 6 N. The resultant of the
    6 N and 8 N forces has a magnitude of
    0.0 N between 0.0 and 10 N 10 N more than 10 N

3. As the angle between two concurrent forces is increased from 15o to 75o, the magnitude of their
    equilibrant
    decreases      increases     remains the same

4. A box of weight W rests on a plane inclined at 30o. What is the magnitude of the component of the weight
    that acts parallel to the incline ?
    W      0.50 W     0.87 W     1.5 W

5. A 10. N block slides down a 30o incline at a constant speed. The force of friction on the block is
    5.0 N      10. N     49 N      98 N

6. Which statement explains why a book resting on a table is in equilibrium ?
    There is a net force acting downward on the book.
    The weight of the book equals the weight of the table.
    The acceleration due to gravity is the same for both the book and the table.
    The book's weight and the table's upward force are equal but opposite in direction.

7. Which combination of concurrent forces could NOT produce equilibrium ?
    5 N, 10 N, and 25 N 10 N, 15 N, and 25 N 15 N, 20 N, and 25 N 20 N, 20 N, and 25 N

8. As the angle between a force and level ground decreases from 60o and 30o, the vertical component
    of the force
    decreases      increases     remains the same

9. A person exerts a 300. N force on the handle of a shovel that makes an angle of 60o with the horizontal
    ground. The component of the 300. N force that acts perpendicular to the ground is approximately
    150 N     260 N     300. N 350 N

10. A box of weight W rests on a plane inclined at 30o. What is the magnitude of the component of the weight
    that acts perpendicular to the incline ?
    W      0.50 W     0.87 W      1.5 N

11. A wooden block is at rest on a wooden inclined plane. As the angle the plane makes with the horizontal
increases, the force of static friction between the block and the plane
decreases increases remains the same

12. An empty wooden crate is slid across a warehouse floor. If the crate were filled,
the coefficient of kinetic friction between the crate and the floor would
decreases increases remain the same

13. An empty wooden crate is slid across a warehouse floor. If the crate were filled,
the force of kinetic friction between the crate and the floor would
decreases increases remain the same