Homework Statement
The front brake pads on your car wear out faster than the rear brake pads; in fact,
some cars are specifically designed with large front brake pads because of this. This
results from the fact that when a car is braking the magnitude of the friction force acting
on the...
Homework Statement
The relative motion of two atoms in a molecule can be described as the motion of a single body of mass m = 3 x 10-26 kg moving in one dimension, with a potential energy given by the equation
U(r)=(A/(r^12))-(B/(r^12))
n this equation A = 10^10 J m^12 and B = 10^20 J m^6 are...
Try #2
So from momentum conservation i got the velocity of both blocks to be 10.46 just before they hit the spring. Using that I got the distance that the spring compressed by .5*m*(v^2)=.5*k*(x^2) and got x to be 4.5m. Then using that I used F=-kx=ma and got a=-24.23. From there I just used a...
Okay so I can plug it into momentum conservation laws to find what the velocity of the combined blocks is. But, does that mean that I can still use energy conservation to figure out how far the spring is compressed after the collision? (I mean 1/2*m*(v^2)=1/2*k*(x^2))
Homework Statement
A person with a mass of 52 kg runs with a speed of 6.8 m/s jumps onto the outer rim
of a merry-go-round. The merry-go-round has a radius of 1.5 m and can be modeled as a
large disk. The merry-go-round was initially at rest before the person jumped onto it and
rotates at...
Homework Statement
A mass m1 = 8 kg is at rest on a frictionless horizontal surface and connected to a
wall by a spring with spring constant k = 70 N/m as shown in the figure. A second mass
m2 = 5 kg is moving to the right at vo = 17 m/s. The two masses collide and stick
together. How long...
Homework Statement
A 36 kg mass is placed on a horizontal frictionless surface and then connected to
walls by two springs with spring constants k1 = 3 N/m and k2 = 4 N/m. What is the
frequency, f (in Hz), of oscillation for the 36 kg mass if it is displaced slightly to one
side...
Homework Statement
A 5 kg sphere is connected to a thin
massless, but rigid rod of length L = 1.3 m to
form a simple pendulum. The rod is connected
to a nearby vertical wall by a spring with spring
constant k = 75 N/m, connected to it at a
distance h = 1.1 m below its point of...
Well, the equation for how it increases is just .6*(rotation number). The average torque would be the maximum and minimum divided by two...The maximum is obviously 12 so would that make the minimum be 0? That doesn't really make sense though. In that case the average would be 6. The equation for...
Homework Statement
A 3 m long cantilever with a mass of 250 kg is
attached to a wall and also held in place by a steel cable
that is attached to the far end of the cantilever at an angle
of 30° with respect to the cantilever as shown in the figure
at right. A 5 kg mass also hangs from...
Homework Statement
It takes 20 turns to drive a screw completely into a block of wood. Because the
friction force between the wood and the screw is proportional to the contact area between
the wood and the screw, the torque required for turning the screw increases linearly with
the...
Spring B. That's what my gut feeling was.
So if I understand everything correctly we don't need to know equilibrium length. If we were to actually solve this problem would we need it then?
Homework Statement
An 8 kg mass is hanging from two springs that are attached to the ceiling as shown in the figure. The spring constant of spring A is 165 N/m and the spring constant of spring B is 123 N/m. Which spring has a larger displacement?
Note: Spring A is attached to the ceiling on...