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.

One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. you see that the patch of light seems to be a circular diffraction pattern. it appears that the central maximum is about 1 cm across and you estimate that the distance from the window shade to the wall is about 3 m. what is (a) the average wavelength of sunlight? (b) the diameter of the pinhole?

Acricket ball of 70g moving with a velocity of 0.5 m/s is stopped by a player in 0.5s what is the force applied to stop the ball

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec