Question

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. What is this speed in mi/h?

1) 65,500 mi/h
2) 25,300 mi/h
3) 18,200 mi/h
4) 1,090 mi/h
5) 5.02 × 10-3 mi/h

Answer 1

The speed needed to escape Earth's gravity is 11.3 km/s, which is approximately 25,848 mi/h.

Step-by-step explanation:

The speed needed to escape the pull of Earth's gravity is 11.3 km/s. To convert this speed to mi/h, we can use conversion factors. There are 0.621371 mi in 1 km and 3600 s in 1 hour. So, multiplying 11.3 km/s by both conversion factors, we get:

11.3 km/s × 0.621371 mi/km × 3600 s/h = 25848 mi/h

Therefore, the speed needed to escape Earth's gravity is approximately 25,848 mi/h. The correct answer is option 2) 25,300 mi/h.