On finding kinetic energy? ? a skateboard is standing on top of a 4 meter half-pipe and is ready to jump onto the half-pipe. what is the skateboarder's kinetic energy?

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle