## Grantham PHY220 Week 1 Assignment

Problems: One lightyear is defined to be the distance light can travel in one year. What is this distance in meters? How long does it take for light to get to the Moon? [Solution] Multiply $latex 1.783\times 10^{-2}\cdot 4.4\times 10^{-3}&s=2&fg=000000$, taking into account significant figures. [Solution] What is the surface area of a sphere of … Continue reading Grantham PHY220 Week 1 Assignment

A baseball is thrown downward from a 50-ft tower with an initial speed of Determine the speed at which it hits the ground and the time of travel. SOLUTION: $latex v_2^2=v_1^2+2a_c\left(s_2-s_1\right)&s=2&fg=000000$ $latex v_2^2=\left(18\right)^2+2\left(32.2\right)\left(50-0\right)&s=2&fg=000000$ $latex v_2=59.532\:ft/s&s=2&fg=000000&bg=8DB600$   $latex v_2=v_1+a_ct&s=2&fg=000000$ $latex 59.532=18+32.2\left(t\right)&s=2&fg=000000$ $latex t=1.29\:s&s=2&fg=000000&bg=8DB600$