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...
A 2.20 kg frictionless block is attached to an ideal spring with force constant 314 n/m . Initially the block has velocity -3.70 m/s and displacement 0.270 m.Find the amplitude of the motion in mFind the maximum acceleration of the block in m/s^2Find the maximum force the spring exerts on the block in n