The crate, which has a mass of 100 kg, is subjected to the action of the two forces (Figure 1). If it is originally at rest, determine the distance it slides in order to attain a speed of 6 m/s. The coefficient of kinetic friction between the crate and the surface is uk = 0.2. 800 N 30° 1000 N

A Jet of oil of relative density 0.8 and of area 0.01 m² strikes normally on a stationary plate at a velocity of 20 m/s. Find the force exerted on the plate.

Fluid Mechanics A drop of water at 20oC is forming under a solid surface. The configuration just before separating and falling as a drop is shown in the picture. Assume the forming drop has a volume of a hemisphere and the force holding the drop to the surface is the surface tension. What is the diameter of the hemisphere just before separating?

The ladder and the person weigh 30 lb and 180 Ib, respectively. The center of mass of the 12-ft ladder is at its midpoint. The coefficient of static friction between the ladder and the floor is 0.50. What is the largest value of the angle ALPHA for which the person could climb to the top of the ladder without it slipping? The ladder and the person weigh 30 lb and 180 Ib, respectively. The center of mass of the 12-ft ladder is at its midpoint. The coefficient of static friction between the ladder and the floor is 0.5 and the coefficient of friction between the ladder and the wall is 0.3. What is the largest value of the angle ALPHA for which the person could climb to the top of the ladder without it slipping?

--Determine the maximum force P that can be applied without causing movement of the 90-kg crate that has a center of gravity at G. The coefficient of static friction at the floor is p0.5, as shown in the Figure 10. (20 Marks) Fig. (10) 0.5 m 0.5 m 6.7 m

Q3. An aluminium-alloy cylinder of internal diameter 10.000cm and wall thickness 0.50cm is shrunk onto a steel cylinder of external diameter 10.004cm and wall Thickness 0.50cm. If the values of Young's modulus for the alloy and the steel are 70 GN/m² and 200 GN/m", respectively, estimate the circumferential stresses in the cylinders and the radial pressure between the cylinders. SPARK4

the uniform 50 kg plank is resting on friction surfaces at A and B. the coefficient of static friction are shown in the figure. if an 80 kg man starts walking from A to B, determine the distance x when the plank will start to slide.

A block is kept at rest at shown in figure. The coefficient of friction between the contact surfaces is 0.6. For the applied load of 20 N, the acceleration (in m/s²) of the block is (g = 10 m/s²). 5kg 20 N

A conical pointed shaft turns in a conical bearing. The gap between shaft and bearing is filled with oil having viscosity of 0.2 Ns/m?. Calculate the viscous torque that acts on the shaft. a- 0.25 mm 0 = 30 rev/s 0 = 30 H- 25 mm

A 2-m long concrete traffic barrier is used to provide safety for workers, pedestrians, and motorists during highway construction. The concrete has 0.024 N/cm3 specific weight. The interface between the barrier and pavement has static and kinetic coefficients of friction of 0.45 and 0.4, respectively, and h = 45 cm. Determine the force P that will cause motion of the barrier. 60 cm 60 cm 3 @ 18 cm