Civil and Environmental Engineering Answers

A 160 cm tall person lies on a light ( massless) board which is supported by two weighing scales, one under the feet and one beneath the top of the head. The two scales read, respectively ,29.4 and 32.8 kg. Where is the center of gravity of this person?

Where must a 500 N weight be hang on a uniform beam with a length of 5 m and weighing 150 N so that a woman at one end of the beam carries only one fourth as much load as a man at the other end?

Given three vectors with magnitudes A= 3, B= 4 and C = 10. Vector A is along the + axis, vector B makes an angle of 30

Compute the direction and magnitude of the resultant of the following system of coplanar and concurrent forces; 20 N, 40 N, 25N, 42N, and 12 N making an angle of 30

Resolve a force of 20 N into two components at right angle, the line of action of one component making an angle of 45

A man walks westward on ship with a speed of 4 km/hr. The ship's propeller drives it 15 km/hr south. What is the actual speed of the man relative to the earth? What is the direction of his velocity?

The approximate speeds of three animals follows , but in different units of speed. Convert these data to m/s and arrange the animals in order of increasing maximum speed: fox, 1100 m/mm : cheetah , 70.8 mi/ hour; lion, 1900 km/day. ( 1m = 3.28ft., 1mi = 1.61 km.)

How long is a microcentury in minutes

The length and width of a lot in inches are 200 × 400. Express it's area in square meters

The distance to a village is recorded as 3.4 miles but the last figure is doubtful. Properly express this distance in feet.