Question

Compare the movement of four cars. Car A covered a distance of 60 km in 1hr.
Car B covered a distance of 30 km in 30 minutes. Car C covered a distance of 20
km in 15 minutes, Car D covered a distance of 10 km in 7 minutes, which car had
the highest velocity?"

Answer 1

Answer:

car D

Explanation:

1) before to compare all the values of the velocities, they must be in the same units of measurement. It means:

for car A: V=60km / 1h=60km/h;

for car B: V=30km / 0.5h=60km/h;

for car C: V=20km / 0.25h=80km/h;

for car D: V=10km / (7/60)h≈85.7km/h.

2) according to the values calculated in item 1 the car D had the highest velocity.

Answer 2

Answer:

Below

Explanation:

We can use this formula to find the velocity of an object

     velocity = displacement / change in time

*note I converted all distances to meters and all times to seconds, its not necessary though**

CarAvelocity = 60,000 m / 3600 sec

                      = 16.66667 m/s

CarBvelocity = 30,000 m / 1800 sec

                     = 16.66667 m/s

CarCvelocity = 20,000 m / 900 sec

                      = 22.2222 m/s

CarDvelocity = 10,000 m / 420 sec

                      = 23.80952 m/s

Therefor, car D has the highest velocity

Hope this helps!