Solar energy is incident on the top of earth’s atmosphere at the rate of about 1,360 watts on every square meter (w/m2). This energy effectively falls on the cross-sectional area of the planet. From this fact, calculate the total rate at which solar energy arrives at earth. you’ll need to find earth’s radius

You throw a baseball directly upward at time t = 0 at an initial speed of 12.3 m/s. what is the maximum height the ball reaches above where it leaves your hand? at what times does the ball pass through half the maximum height? ignore air resistance and take g = 9.80 m/s2.

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

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