Mechanical Science - Coursework Example

The meter consists of a close end tube in which the water is collected. One orifice or more than one orifice at the bottom of the meter can be provided (for the purpose of changing diameter of the pipe). As the head h inside the orifice meter increases the flow rate through an orifice increases. When the flow rate out of the orifice is equal to the flow rate into the meter the head will be established at the fixed value. Now the flow rate is related to the head h and diameter of the orifice. The pin jointed frame work help us to build up frameworks base on 30, 45 and 60 angles.

To measure the force in the members of a pin jointed frame work, we can use such an apparatus in which each of the members has a force sensor bended to the surface. The sensors that are used to measure the forces in member are staring gauges. Strain gauges are such sensors that under goes a change in electrical resistance when they stretch or compress. Now this change in resistance can be show in terms of displacement (Strain). Where F is the force exerted by the water jet on the flat plate, ρ is the density of the water (i.e. 1000 kg/m3), Q is the volumetric flow rate and ∆V is the change in velocity of the water just after and before impact.

Now in order to experimentally calculate this force, we need such an apparatus in which there is water coming from a nozzle and impacting on a plate. Further an arrangement is provided to measure the volumetric flow rate and velocity before impact. Velocity of jet after impact can be taken as zero. For measuring the velocity before impact we should know the velocity at the nozzle. The velocity at nozzle can be measured by dividing the volumetric flow rate by area of nozzle (For area of nozzle the diameter of nozzle should be known).

F is the force, m is the mass of an object, a is the acceleration. Force is the cause of the acceleration, and mass is a measure of the tendency of an object to resist a change in its linear translational