Machine elements

Determine the Sommerfeld number considering the following data for hydrodynamic bearing?
1. Diameter of bearing = 120 mm
2. Bearing pressure = 5 N/mm2
3. Oil viscosity = 30 cP
4. Journal speed = 900 rpm
5. Radial clearance = 150 microns

a. 0.2360

b. 0.0144

c. 0.0115

d. 0.0178

Choose an answer and give an explanation

2.What is the momentum of a body of 2 kg at its highest point, when thrown with a velocity of 15 m/s at an angle of of 70o with the horizontal?

a. 9.23 kg ms-1

b. 10.26 kg ms-1

c. 28.19 kg ms-1

d. None of the above

choose an answer and give an explanation

3. The momentum of a body at its highest point is 10.26 kg ms-1

A block is displaced by 3 m when a force of 200 N is applied on it on an inclined surface which is at an angle of 50o with the horizontal. What is the work done?

a. 385.67 Nm

b. 459.62 Nm

c. 933.00 Nm

d. Insufficient data

Choose an answer and give an explanation.