The drive propeller of a ship starts from rest and accelerates at 2.38 x 10-3 rad/s2 for 2.38 x 103 s. for the next 1.22 x 103 s the propeller rotates at a constant angular speed. then it decelerates at 2.48 x 10-3 rad/s2 until it slows (without reversing direction) to an angular speed of 2.89 rad/s. find the total angular displacement of the propeller.

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?

Which statement is true? a) the work done to lift an object 6 meters is greater than the gravitational potential energy it gains. b) the work required to push an object is less than the work required to pull an object the same distance. c) the work required to raise an object to a height is equal to the gravitational potential energy the object gains. d) the work done against gravity to lift an object straight up is greater than the work required to roll it up a ramp.

How do i solve this physics problem?