To measure the velocity of a car, clocks A and B are set up at two points along the road, as shown. Clock A is precise to 0.01 s, while clock B is precise to only 0.1 s. The distance between these two clocks is carefully measured to be 124.5 m. The two clocks are automatically started when the car passes a trigger in the road; each clock stops automatically when the car passes that clock. After the car has passed both clocks, clock A is found to read tA = 1.22 s, and clock B to read tB = 4.5 s. The time from the less-precise clock B is correctly reported with fewer significant figures than that from A. What is the velocity of the car, and how should it be reported with the correct number of significant figures?
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
