Calculate the potential, kinetic and mechanical energy of a water balloon that is dropped from a height of 15m when:
a. The balloon is at 10 m from the ground. b. The balloon has traveled 10 m.
c. The balloon is hitting the ground.
d. The balloon’s mass is 2.5 kg.
Hint: at the highest point the kinetic energy is 0, and at the lowest point the potential
energy is 0.

Abanked road comer of radius 146 m is to be constructed. if the comer is designed for vehicles moving with a speed of 20.0 m/s, what should the banking angle be, in units of degrees?

The a992 steel rod bc has a diameter of 50 mm and is used as a strut to support the beam. determine the maximum intensity w of the uniform distributed load that can be applied to the beam without risk of causing the strut to buckle. take f.s. = 2 against bucklin

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.