Question

What is the speed change of the rover as it lands?


From 15 times the speed of a bullet to 3 mph.


From 2000 mph to 3 mph.

Answer 1

To determine the speed change of the rover as it lands, we first need to clarify the two scenarios you provided.

1. **From 15 times the speed of a bullet to 3 mph:**
- The speed of a bullet is typically around 1,700 mph (or about 2,200 feet/second). Therefore, 15 times the speed of a bullet would be:
\[
15 \times 1,700 \text{ mph} = 25,500 \text{ mph}
\]
- The speed change from 25,500 mph to 3 mph is:
\[
25,500 \text{ mph} - 3 \text{ mph} = 25,497 \text{ mph}
\]

2. **From 2000 mph to 3 mph:**
- The speed change from 2000 mph to 3 mph is:
\[
2000 \text{ mph} - 3 \text{ mph} = 1997 \text{ mph}
\]

In summary, the speed changes are:
- **From 15 times the speed of a bullet (25,500 mph) to 3 mph:** 25,497 mph
- **From 2000 mph to 3 mph:** 1997 mph