Question

A science teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Jennifer and Johnny work hard and decide the velocity of the car is 34.87 m/s. The teacher informs them that the actual velocity is 34.15 m/s. Will Jennifer and Johnny pass their final project? SHOW ALL YOUR WORK TO GET ANSWER.

Answer 1

yes. Jennifer and Johny pass their final project.

error = 2.5 %

actual velocity = 34.15 m/s

calculated velocity = 34.87 m/s

so the difference = 34.87 - 34.15

                           = 0.72

2.5 % error allows = 34.15 x 2.5 / 100

                              = 0.85

0.72 is the % error of =( 0.72 / 34.15) x100

                                  = 2.1 %

so the teacher mentiond not more than 2.5 % error. this is only 2.1 % error below 2.5% . so they pass their final project.