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Why is a block and tackle useful?
A block and tackle magnifies the pulling force applied to rope. This is useful for moving heavy objects, lifting heavy objects, etc. A good Example is all the old sailing ships like in The movies "Pirates of the Caribbean" used block and tackle to move and trim the sails. This is still in use by window washers on skyscrapers to exercise machines.
How pneumatic and hydraulics systems multiply force?
Pressure Exertion: When a force is applied to a small piston or area on one side of the hydraulic device, it creates pressure within the enclosed fluid. The pressure is given by the formula P = F/A, where F is the force applied and A is the area over which the force is applied. Transmission of Pressure: The pressure generated is transmitted through the incompressible hydraulic fluid to all parts of the system. The pressure is the same throughout the fluid due to Pascal's law. Larger Area on the Output Side: The hydraulic fluid transmits this pressure to a larger piston or area on the other side of the hydraulic device. Since pressure is force per unit area, the larger area results in a higher force output. The output force (F_out) can be calculated using the same pressure formula (P = F_out/A_out), rearranged to solve for F_out: F_out = P * A_out.
What is bearing stiffness?
All bearings and bushings have a basic stiffness. When you apply load on the shaft the shaft will move, and so the stiffnes can be calculated from the ratio of the applied force to the absolute value of movement.
How does air brake use pneumatic power?
An air brake uses a diaphragm connected to an operating rod to work the brake. Behind the diaphragm there is a spring which applies the breaking force at all times. To release the break either pressure is applied to the other side of the diaphragm or a vacuum is applied to the spring side. Because the diaphragm has a large surface area just a few p.s.i. can produce a large force. E.g. A 8 inch diameter unit would produce over 700 lbs thrust at 14psi this force is often further amplified by the leverage of the linkage. This arrangement makes the brake fail to the safe "on" state.
How are engines on an airplane made?
like all other engines they are made/manufactured in a factory on an assembly line or mostlikely now, by machines
A machine is used to multiply?
Machines multiply themselves, creating a machine army to take over the world.
What do all simple machines have in common?
A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at the cost of a proportional decrease in the distance moved by the load.
How do you calculate the mechanical advantage of any machine?
distance over which the force is applied ________________________________ Distance over which the load was moved or MA= Effort Force _________ Load force OR MA= Length of Load arm ____________________X Weight/mass Length of Effort arm
How do you canculate net force?
Net force is the resultant force, so it is the applied force minus all the opposing forces
What is the force that prevents all machines from being 100 percent efficient?
Friction is the force that prevents all machines from being 100 percent efficient. It produces a resisting force that hinders the machine's complete functioning. Reducing friction will enhance efficiency.
What condition does an object on which a constant force is applied have a zero acceleration?
An equal and opposite force is also applied to the object, so that the vector sum of all the forces on it is zero.
What can happen to objects when force is applied on them?
If it is applied equally to all points, then the effect is to accelerate the body according to F = M * a. If it's not homogenous, then it may also cause a rotation.
what are all the simple machine in a fridge?
Lever: A bar that turns around a fulcrum (pivot point) used to lift an object when a force is applied on the other side. Incline Plane: A sloped surface used to raise an object. Pulley: Used to change the direction of force and or multiply it.
An object will accelerate in the direction of the?
An object accelerates in the direction of the net applied force, which is the vector sum of all applied forces.
When is it apparent that all forces are balanced?
when the object is constant even when there is a force applied.
What is the vector sum of all applied and frictional forces on an object is?
Net Force
An applied force and a frictional force act on an object The object accelerates in the direction of the applied force Which of the following describe how the frictional force compares to the applied?
We're forced to go out on a limb here and propose an answer without benefit ofthe "following" list of choices, since, apparently, the question was automaticallytruncated and the choices were lost. It's a shame you went to all that trouble tocopy the choices along with the question, only to see them deleted by some nasty 'bot'.Since the object accelerates in the direction of the applied force, the net force on it ...equal to the vector sum of the applied force and the friction force ... must point inthe direction of the applied force, and so the frictional force must be less than theapplied force.
