Some students investigate the speed of cars. They measure the time it takes each car to travel 80m. State 2 measuring instruments they must use.

Answer 1

Two measuring instruments that the students must use to investigate the speed of cars are:

1. Stopwatch or timer: This instrument is used to measure the time it takes for the car to travel 80m. The students can start the stopwatch when the car passes a certain point and stop it when the car reaches the end of the 80m distance.

2. Measuring tape or ruler: This instrument is used to measure the distance traveled by the car. The students can use a measuring tape or ruler to measure the 80m distance accurately.