A 28.5 kg block is being pulled by a force F = 245 N up along a
rough incline. The coefficient of kinetic friction between the
block and the incline is μk = 0.30. The block is pulled through a
distace of 21.0 m. Angle is 33 degrees.
(a) Solve for the magnitude of the normal force FN (in Newtons)?
Calculate the work (in Joules) done by the normal force. Pay
attention to the angle in the work formula and...
the mass of block A is 80 kg, the mass of block b is 20 kg, and
A is connected to B with the cable and pulley system shown. the
pulleys rotate freely, and the cable and pulleys have negligible
mass. the coefficient of static fricion between A and the
horizontal surface is Ms=0.4, and the coefficient of kinetic
friction is Mk=0.3.
a) initially, block A is being held stationary and the system is
at rest in static equilibrium ....
A block of mass 2 kg and a block of mass 3 kg are sliding on a
frictionless surface. They collide and stick together. Before the
collision the first block was travelling at 5 m/s in the positive x
direction. After the collision the two blocks are travelling at 6
m/s in the negative x direction. What was the x component of the
velocity of the second block before the collision?
A small block with mass 0.0400 kg is moving in the xy-plane. The
net force on the block is described by the potential- energy
function U(x,y)= (5.90 J/m2 )x2-(3.90 J/m3 )y3.
a- What is the magnitude of the acceleration of the block when
it is at the point x= 0.29 m , y= 0.66 m ?
b- What is the direction of the acceleration of the block when
it is at the point x= 0.29 m , y= 0.66 m...
A small block with mass 0.0400 kg is moving in the
xy-plane. The net force on the block is described by the
potential- energy function U(x,y)= (5.90 J/m2 )x2-(3.50 J/m3
)y3.
A)
What is the magnitude of the acceleration of the block when it
is at the point x= 0.39 m , y= 0.68 m ?
Express your answer with the appropriate units.
B) What is the direction of the acceleration of the block when
it is at the point...
A horizontal force with a magnitude of 30 N pushes a block which
has a mass of 4.19 kg on the floor which has a coefficient of
kinetic friction of 0.51.
How many Joules of work does the force do to the floor-beam system
as the block travels 3.86 m along the floor?
During movement on the floor, the heat energy in the block
increases by 39.5 J. What is the Joule of increase in heat energy
in the floor?...
A 13.0 kg block is dragged over a rough, horizontal surface by a
88.0 N force acting at 20.0° above the horizontal. The block is
displaced 4.50 m, and the coefficient of kinetic friction is
0.300.
(a) Find the work done on the block by the 88.0 N force.
(d) What is increase in internal energy of the block-surface
system due to friction?
(e) Find the total change in the block's kinetic energy.
A block of mass m1 = 1.31 kg and a block of mass
m2 = 11.4 kg are connected by a massless string over a
pulley in the shape of a solid disk having radius R = 0.250 m and
mass M = 2 kg. The fixed, wedge-shaped ramp makes an angle of θ =
30.0° as shown in the figure. The coefficient of kinetic friction
is 0.24 for both blocks. Determine the acceleration of the
blocks.
A block of mass m1 = 1.33 kg and a block of mass
m2 = 10.4 kg are connected by a massless string over a
pulley in the shape of a solid disk having radius R = 0.250 m and
mass M = 3 kg. The fixed, wedge-shaped ramp makes an angle of θ =
30.0° as shown in the figure. The coefficient of kinetic friction
is 0.44 for both blocks. Determine the acceleration of the
blocks.
A net force of 64 N acts on a mass of 16 kg. find the resulting
acceleration?
(Ans: F=ma, a=4)
An object has an acceleration of 3.0 m/s2 when the only force
acting on it is F0. (a) What is its acceleration when this force is
doubled? Explain (Ans: 6 m/s2)
The mass of a body that weighs 2.00 N at sea
level is?
(Ans: F=mg, m=
0.204)
The acceleration due to gravity on the moon is only about 1/6
of...