A soccer team has 10 players and needs to choose 2 captains. How many ways can the captains be selected? X) Select one:

20

90

180

45

An inclined plane wrapped around a metal shaft is a a. lever b. screw c. pulley d. wedge

Which of the following is an example of units for speed

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)