A 107-kg crate is being pushed across a horizontal floor by a
force P that makes an angle of 18.5 ° below the horizontal. The
coefficient of kinetic friction is 0.246. What should be the
magnitude of P, so that the net work done by it and the kinetic
frictional force is zero?
A 102-kg crate is being pushed across a horizontal floor by a
force P that makes an angle of 41.7 ° below the horizontal. The
coefficient of kinetic friction is 0.232. What should be the
magnitude of P, so that the net work done by it and the kinetic
frictional force is zero?
A 1,300-N crate is being pushed across a level floor at a
constant speed by a force F of 390 N at an angle of 20.0° below the
horizontal, as shown in the figure a below. Two figures show a side
view of a crate positioned upon a horizontal surface. Figure (a):
An arrow pointing downward and to the right is labeled vector F and
forms an angle of 20° below the horizontal as it approaches the
upper left edge...
Elmer Fudd pulls a 65.0 kg wooden crate of mass
m across the floor with a force F at an angle of
34.0°. The coefficient of friction between the surfaces is m =
0.235. If the crate moves at a constant speed, what is the
magnitude of the applied force F?
A 38.0-kg crate is being pushed along a horizontal surface. The
applied force is 94.0 N directed at an angle of 18.0° below the
horizontal and the coefficient of friction is .21.
a) Draw a free body diagram for the crate.
b) Write expressions for the x and y components of
the applied force (no numbers).
c) Sum forces in the x and y direction (no
numbers).
d) Solve: What is the acceleration of the
crate?
A box is pushed across a rough horizontal floor by a
force acting parallel to the floor in the direction of motion. A
force doing negative on the box is------
gravity
friction
the applied force
normal force of the floor upward on the
body
KINETIC FRICTION
You’re trying to move a large, 60kg wooden crate across a wooden
floor. (μs = 0.35). YoYou try again pushing with 120N perfectly
horizontally. Again you realize you can exploit the
relationship between normal force and friction to make your life
easier, and decide to attach a rope and drag the box, pulling up
with at an angle of 10°. You easily match the former acceleration
of 0.04 m/s2 .
A. Draw a free-body diagram for the box.
B....
A person pushes a 500kg crate with a force of 700 N across a
concrete floor. Given the coefficicent of kinetic friction is 0.100
what is the acceleration of the crate across the floor?
A 12.0-kg block is pushed across a rough horizontal surface by a
force that is angled 30.0◦ below the horizontal. The magnitude of
the force is 75.0 N and the acceleration of the block as it is
pushed is 3.20 m/s2 . What is the magnitude of the contact force
exerted on the block by the surface?
A 45.0-kg crate is dragged at constant velocity 8.20 m across a
horizontal floor with a rope making a 30 degree angle above the
horizontal. The coefficient of kinetic friction is 0.250. Find the
work done by friction. Give your answer in Joules.