6-53. The beam is made from three boards nailed together as shown. If the moment acting on the cross section is M = 600 Nm, determine the resultant force the bending stress produces on the top board. 25 mm 20 mm 150 mm 20 mm 200 mm M = 600 N·m

The baloon is in balance with 3 ropes. If each of the rope can stand to 500N tensile force, find the minimum F force that the ropes will not broke.

A railroad car and its cargo have a total weight of 50 kips. The car is sup 5-50 ported on eight wheels, each of which has a diameter of 25 in. If the co cient of rolling resistance is 0.015 in. between the wheels and the trach and the wheels share the load equally, determine the magnitude of the ho izontal force required to overcome the rolling resistance of the wheels.

Given: (L, H, F) = (4.00, 4.75, 10.00) • L = 4.00 m • H = 4.75 m • F = 10.00 Newtons A B D - DT <―DT DG BEG E C F Find: ⚫ the magnitude of the force in member DT = Newtons