An ultracentrifuge accelerates from rest to 100,000 rpm in 1.70 min. (a) what is its angular acceleration in rad/s2? rad/s2 (b) what is the tangential acceleration of a point 10.55 cm from the axis of rotation? m/s2 (c) what is the radial acceleration of this point at full rpm? m/s2 (d) express this radial acceleration as a multiple of g.

The path of a satellite orbiting the earth causes it to pass directly over two tracking stations a and b, which are 51 miles apart. when the satellite is on one side of the two stations, the angles of elevation at a and b are measured to be 87 degrees and 84 degrees, respectively. (a) how far is the satellite from station a? (b) how high is the satellite above the ground?