A brave but inadequate rugby player is being pushed backward…

A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 N on him. The mass of the losing player plus equipment is 90.0 kg, and he is accelerating at 1.20 m/s^2 backward.  What is the force of friction between the losing player’s feet and the grass?

A beam has dimensions of b = 16 in., h = 24 in., and d = 21….

A beam has dimensions of b = 16 in., h = 24 in., and d = 21.5 in. and is reinforced with 2 No. 7 bars. The concrete strength is 4,000 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 1.323529 in. and the strain in the reinforcement is εs = 0.038423, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

A simply supported beam with dimensions of b = 12 in., h = 3…

A simply supported beam with dimensions of b = 12 in., h = 30 in., d = 27.5 in., and L = 15 ft supports a uniform service (unfactored) dead load consisting of its own weight plus 1.6 kips/ft and a uniform service (unfactored) live load of 1.0 kips/ft. The concrete is normal-weight concrete. Determine the moment due to the factored loads, Mu.      

A beam has dimensions of b = 16 in., h = 26 in., and d = 23….

A beam has dimensions of b = 16 in., h = 26 in., and d = 23.5 in. and is reinforced with 2 No. 7 bars. The concrete strength is 4,900 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth to the neutral surface is c = 1.342152 in., determine the strain in the reinforcement.

A beam has dimensions of b = 18 in., h = 26 in., and d = 23….

A beam has dimensions of b = 18 in., h = 26 in., and d = 23.5 in. and is reinforced with 3 No. 8 bars. The concrete strength is 5,500 psi, and the yield strength of the reinforcement is 60,000 psi. Assuming the reinforcement has yielded, determine the depth to the neutral axis, c.