Question

A 5 kg block is at rest on a 20° surface, where ?s = 0.65. If an additional pulling force FP is applied in a direction perpendicular to the surface, what would the magnitude of that force have to be in order for the block to slide down the surface? a) 15.6 N b) 18.1 N c) 20.3 N d) 19.2 N e) 22.1 N

Answer #1

A 6.53-kg block initially at rest is pulled to the right along a
horizontal surface by a constant force of 125 N applied at an angle
θ above the horizontal. The coefficient of kinetic friction between
the block and the horizontal surface is 0.150. At what angle θ
above the horizontal surface should the force be applied to achieve
the largest possible speed after the block has moved 5.00 m to the
right?

A 2.70-kg block starts from rest at the top of a 30.0° incline
and slides a distance of 1.90 m down the incline in 1.20 s.
(a) Find the magnitude of the acceleration of the block.
(m/s)^2
(b) Find the coefficient of kinetic friction between block and
plane.
(c) Find the friction force acting on the block.
Magnitude N
Direction
(d) Find the speed of the block after it has slid 1.90 m.
(m/s^2)

A 5 kg block rests on a flat surface with a coefficient of
static friction of 0.5 and a coefficient of kinetic friction of
0.3.A force of 20 N pushes on the block does not move . what is the
magnitude of the frictional force on the block

you
push a 40.0 kg block that remains stationary on a horizontal
surface with an applied force Fa. the force has a magnitude of 200
N and is directed at an angle of 30 degrees below the horizontal.
What is the magnitude of the normal force exerted on the block by
the surface?

In the figure, a 5.40 kg block is sent sliding up a plane
inclined at θ = 37.0° while a horizontal force
of magnitude 50.0 N acts on it. The coefficient of
kinetic friction between block and plane is 0.330. What are the
(a) magnitude and (b) direction
(up or down the plane) of the block's acceleration? The block's
initial speed is 4.30 m/s. (c) How far up the
plane does the block go? (d) When it reaches its
highest...

A 200 kg block has three forces applied to it at the same time:
F1 = 30.0 N force at 40.0°,
F2= 150 N force at 95.0°, and
F3 = 75.0 N force at 206.0°. (All
angles are measured counterclock-
wise from the positive x -direction.) There is no
gravitational force.
a. Find
the x and y components of the net force on the block.
b. Find the
magnitude and direction of the net force.
c. The
block was initially at rest; after...

A 200 kg block has three forces applied to it at the same time:
F1 = 30.0 N force at 40.0°,
F2= 150 N force at 95.0°, and
F3 = 75.0 N force at 206.0°. (All
angles are measured counterclock-
wise from the positive x -direction.) There is no
gravitational force.
a. Find
the x and y components of the net force on the block.
b. Find
the magnitude and direction of the net force.
c. The
block was initially at rest; after...

A 200 kg block has three forces applied to it at the same time:
F1 = 30.0 N force at 40.0°,
F2= 150 N force at 95.0°, and
F3 = 75.0 N force at 206.0°. (All
angles are measured counterclock-
wise from the positive x -direction.) There is no
gravitational force.
a. Find
the x and y components of the net force on the block.
b. Find
the magnitude and direction of the net force.
c. The
block was initially at rest; after...

A
200 Kg block has three forces applied to it at the same time: F1 =
30.0 N force at 40.0 degrees, F2 =150 N force at 95.0 degrees,
& F3 = 75.0 N force at 206.0 degrees. (Angles measured
counterclockwise from positive x-direction) There is no
gravitational force.
a. Find the x & y components of the net force on the
block
b. Find the magnitutude and direction of the net force.
c. The block was initially at rest;...

A 4 kg block is sliding at an initial speed of 10 m/s across a
surface, encountering a constant friction force of 9 N. How much
work is done on the block after it slides 20 cm?
How fast is the block moving after sliding 20 cm?
What's the total distance the block travels before coming to
rest?
What is the average power of friction on the block over the time
it takes the block to come to rest?
What...

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