Adisc cam (with a base circle diameter of 100 mm) must produce a lift of 40 mm. this must occupy 90 degrees of rotation. the knife-edge follower then dwells at this level for 30 degrees, and the fall over the next 90 degrees. there is then 150 deg of rotation to complete the cycle. design a cam profile for constant velocity when rising and falling. if the velocity is 25 mm/sec, what must be the speed of rotation?

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

=force × distance a. work b. velocity c. pressure d. momentum

How many meters will a car travel if its speed is 45 m/s in an interval of 11 seconds? question 2 options: a) 450 meters b) 495 meters c) 4.09 meters d) 498 meters