The rigid truss supports the loads shown. Find the reactions the pin A and roller D exert on the truss.
All concentrated loads act on the pins joining the truss members
determine the terminal voltage in each battery.
also the batterys currents are opposing each other.
Homework Equations Vab=emf-Ir
The Attempt at a Solution i used kirchnoffs rule to find the current I ...
ok thanks, but for the second problem i meant to write: If the car is traveling along and the road is banked at 13 degrees, and there is no friction, at what velocity would the car begin to slide? If im remembering correctly it seems as though my professor broke up the mg component for this...
Homework Statement prob1) For a car traveling with a speed v around a curve of radius r, determine a formula for the angle at which a road should be banked so that no friction is required.
prob2)Calculate the frictional force needed for a 900kg car traveling around a 500m radius curve at...
A wooden block is cut into two pieces, one with three times the mass of the other. A depression is made in both faces of the cut, so that a firecracker can be placed in it with the block reassembled. The reassembled block is set on a rough-surfaced table, and the fuse is...
A 7.5 m long uniform aluminum pole with a mass of 12.0 kg supports a 21.5 kg traffic light. The aluminum pole is attached to a vertical pole by a pivot near the base. A massless horizontal rope supports the aluminum pole and is connected to the vertical pole 3.80 m above...
ok so i used the equation 2gyf=r^2+vi^2 solved for yf and got yf=1.1m so sin(15)=1.1/h hypotenuse=.43m im getting stuck on the last part now,solving for the time.I think i need the radius of the loop but cant seem to figure it out...
ok so i calculated the torque required disregarding the resistive force and got \tau=.063M/N then i calculated the torque of the resistive force and got \tau=-.006M/N so i figured i just add .006M/N of torque to .063 and got .069M/N
A hoop rolling on a horizontal surface with a speed v=3.3m/s when it reaches a 15 deg incline.How far up the incline does it go?How long will it be on the incline before it reaches the botttom?
conservation energy going up=2gyf=r2+vi2...
A merry-go-round has a mass of 1640 kg and a radius of 7.50 m. How much net work is required to accelerate it from rest to a rotation rate of 1.00 revolutions per 8.00s? Assume it is a solid cylinder.
A grinding wheel is a uniform cylinder of with a radius of 8.50 cm and a mass of 0.580 kg. Calculate a) its moment of inertia about its center, and b) the applied torque needed to accelerate it from rest to 1500 rpm in 5.0 s if it is known to slow down from 1500 rpm to rest...
A spool of wire mass m and radius r is unwound under a constant force F. Assuming that the spool is a uniform solid cylinder that does not slip, show that the acceleration of the center of the mass is 4F/3m
well, because my lab book says "The moment of inertia is given mathematically by \Sigmamr2.... so yes it seems like the moment of inertia is mr2,however when i look at all the moment of inertias for different objects solid sphere I=2/5mr2, solid cylinder 1/2mr2 and so on.... where does the 2/5...
A plyground merry go round of radius r=2m had a moment of inertia of I=250kg/m2 and is rotating at 10rpm about a frictionless verticle axle.Facing the axle a 25kg child hops onto the merry go round and manages to sit down on its edge.What is the new angular speed of the...
A uniform solid cylinder and a uniform cylindrical shell are placed side by side at the top of an incline.If they sre released from rest and roll without slipping,
A)Determine their speeds when they reach the bottom
B)Which objet reaches the bottom first?
Ok so when you hang a mass on the spring..and then let it go.. Theoretically isn't it supposed to rise back up to the original unstretched position? I have a hard time imagining it would do exactly that depending on the mass.