Determine the force in member EF (in kN) of the loaded simple truss. F1 = 10.2 kN and F2 = 7.3 kN. Note: Please express a tensile force as positive, and a compressive force as negative.

Acatapult is tested by roman legionnaires. they tabulate the results in a papyrus and 2000 years later the archaeological team reads (distances translated into modern units): range = 0.4 km; angle of launch = π/5 rad; landing height = launch height. what is the initial velocity of launch of the boulders if air resistance is negligible?

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

What is the equation for electrical work?