A window washer pushes his scrub brush up a vertical window at constant speed by applying...
A window washer pushes his scrub brush up a vertical window at constant speed by applying a force F⃗ as shown in the figure (Figure 1) . The brush weighs 12.8 N and the coefficient of kinetic friction is μk=0.160. Part A: Calculate the magnitude of the force F⃗ Part B: Calculate the normal force exerted by the window on the brush
Homework Answers
I
have assumed angle to be 53 degrees as the figure was not
visible.Add Answer to:
A window washer pushes his scrub brush up a vertical window at
constant speed by applying...
A window washer pulls a rubber squeegee down a very tall vertical window. The squeegee has...
A window washer pulls a rubber squeegee down a very tall vertical window. The squeegee has mass 150 g and is mounted on the end of a light rod. The coefficient of kinetic friction between the squeegee and the dry glass is 0.790. The window washer presses it against the window with a force having a horizontal component of 3.00 N. If she pulls the squeegee down the window at constant velocity, what vertical force component must she exert? The...
A force of constant magnitude pushes 6.5-kg box 3.4 m up a vertical surface, as shown...
A force of constant magnitude pushes 6.5-kg box 3.4 m up a vertical surface, as shown in the figure. The coefficient of friction is 0.35 and the angle θ is 30.0°. a) Determine the work done on the box by F. b) Determine the work done on the box by the force of gravity. c) Determine the work done on the box by the normal force. d) Determine the increase in gravitational potential energy of the system of the box...
A 2.74 kg block is pushed 1.41 m up a vertical wall with a constant speed...
A 2.74 kg block is pushed 1.41 m up a vertical wall with a
constant speed by a constant force of magnitude F applied at an
angle of 66.3 with the horizontal. The acceleration of gravity is
9.8 m/s2. If the coefficient of kinetic friction between the block
and wall 0.415, find the work done by F.
A 2.74 kg block is pushed 1.41 m up a vertical wall with a constant speed by a constant force of magnitude F...
Block A in the figure (Figure 1) weighs 1.22 N and block B weighs 3.69 N...
Block A in the figure (Figure 1) weighs 1.22 N and
block B weighs 3.69 N . The coefficient of kinetic
friction between all surfaces is 0.304.
Find the magnitude of the horizontal force
F⃗ necessary to drag block B to the
left at constant speed if A rests on B and moves
with it (figure (a)).
Find the magnitude of the horizontal force
F⃗ necessary to drag block B to the
left at constant speed if A is held at rest...
An 11 kg block is pulled up a 37* incline at a constant speed of 3.0...
An 11 kg block is pulled up a 37* incline at a constant speed of 3.0 m/s. The pulling force F is parallel to the incline (sce Figure 1) and has a magnitude of 80 N 11 kg 379 Figure 1 a. (5 points) What is the magnitude of the normal force exerted on the block due to the incline? b. (5 points) What is the magnitude of kinetic friction force exerted on the block by the incline?
v = 2 m/s F = 100 N 3. (4 points) A child pushes a 20...
v = 2 m/s F = 100 N 3. (4 points) A child pushes a 20 kg box across a wood floor as shown in Figure 3. The force exerted by the child is 100 N and horizontal. If the box is moving with a constant speed, 2 m/s. (a). Find the magnitude and the direction of the kinetic friction force on the box (b). Determine the coefficient of kinetic friction between the box and the floor. (C). If the...
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of...
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of 81.0 N directed along the handle, which is at an angle of 45.0° to the horizontal Part A Draw the free-body diagram showing all forces acting on the mower. Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. + 2 O No elements selected We were unable to transcribe this imageConstants - Part B A...
A 2.0 kg block is pushed 2.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 25.0 with the horizontal
A 2.0 kg block is pushed 2.0 m at a constant velocity up a vertical wall by a constant force applied at an angle of 25.0 with the horizontal, as shown in the figure. The acceleration of gravity is 9.81 m/s2.Drawing not to scale. If the coefficient of kinetic friction between the block and the wall is 0.40, find a) the work done by the force on the block. Answer in units of J b) the work done by gravity on the block....
1) You place a book of mass 5.00 kg against a vertical wall. You apply a...
1) You place a book of mass 5.00 kg against a vertical wall. You apply a constant force F⃗ to the book, where F = 99.0 N and the force is at angle of 60.0∘ above the horizontal (Figure 1) . The coefficient of kinetic friction between the book and the wall is 0.300. a) If the book is initially at rest, what is its speed after it has traveled 0.400 m up the wall.
Sam is trying to move a dresser of mass m and dimensions of length L and height H by pushing it with a horizontal force...
Sam is trying to move a dresser of mass m and dimensions of length L and height H by pushing it with a horizontal force F⃗ applied at a height h above the floor. (Figure 1) The coefficient of kinetic friction between the dresser and the floor is μk and g is the magnitude of the acceleration due to gravity. The ground exerts upward normal forces of magnitudes NP and NQ at the two ends of the dresser. Note that...
A window washer pulls a rubber squeegee down a very tall vertical window. The squeegee has mass 150 g and is mounted on the end of a light rod. The coefficient of kinetic friction between the squeegee and the dry glass is 0.790. The window washer presses it against the window with a force having a horizontal component of 3.00 N. If she pulls the squeegee down the window at constant velocity, what vertical force component must she exert? The...
A 2.74 kg block is pushed 1.41 m up a vertical wall with a
constant speed by a constant force of magnitude F applied at an
angle of 66.3 with the horizontal. The acceleration of gravity is
9.8 m/s2. If the coefficient of kinetic friction between the block
and wall 0.415, find the work done by F.
A 2.74 kg block is pushed 1.41 m up a vertical wall with a constant speed by a constant force of magnitude F...
Block A in the figure (Figure 1) weighs 1.22 N and
block B weighs 3.69 N . The coefficient of kinetic
friction between all surfaces is 0.304.
Find the magnitude of the horizontal force
F⃗ necessary to drag block B to the
left at constant speed if A rests on B and moves
with it (figure (a)).
Find the magnitude of the horizontal force
F⃗ necessary to drag block B to the
left at constant speed if A is held at rest...
An 11 kg block is pulled up a 37* incline at a constant speed of 3.0 m/s. The pulling force F is parallel to the incline (sce Figure 1) and has a magnitude of 80 N 11 kg 379 Figure 1 a. (5 points) What is the magnitude of the normal force exerted on the block due to the incline? b. (5 points) What is the magnitude of kinetic friction force exerted on the block by the incline?
v = 2 m/s F = 100 N 3. (4 points) A child pushes a 20 kg box across a wood floor as shown in Figure 3. The force exerted by the child is 100 N and horizontal. If the box is moving with a constant speed, 2 m/s. (a). Find the magnitude and the direction of the kinetic friction force on the box (b). Determine the coefficient of kinetic friction between the box and the floor. (C). If the...
Constants A person pushes a 12.5 kg lawn mower at constant speed with a force of 81.0 N directed along the handle, which is at an angle of 45.0° to the horizontal Part A Draw the free-body diagram showing all forces acting on the mower. Draw the vectors starting at the black dot. The location and orientation of the vectors will be graded. + 2 O No elements selected We were unable to transcribe this imageConstants - Part B A...
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