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