Consider a satellite in a circular orbit above earth's surface. in chapter 4 of the textbook we will learn that the force of gravity changes only the direction of motion of a satellite in circular motion (and keeps it in a circle), but does not change its speed. work done on the satellite by the gravitational force is zero. what is your explanation?

Read the paragraph and answer the question that follows: the town of belmond, iowa, needs to add weather sirens. the loud and steady wail would warn citizens of approaching danger. if past history is an indication, the sirens will save hundreds of lives. with a prediction of a deadly storm season, the alert which sentence should be revised to eliminate redundancy? the town of belmond, iowa, needs to add weather sirens. the loud and steady wail would warn citizens of approaching danger. if past history is an indication, the sirens will save hundreds of lives. with a prediction of a deadly storm season, the alert system is needed immediately.