Problem: A lunar lander is making its descent to Moon Base I. The lander descends slowly under the retro-thrust of its descent engine. The engine is cut off when the lander is 5.0 m above the surface and has a downward speed of 0.80 m/s . With the engine off, the lander is in free fall. What is the speed of the lander just before it touches the surface? The acceleration due to gravity on the moon is 1.6/s2.

🤓 Based on our data, we think this question is relevant for Professor Woods' class at USF.

Problem Details

A lunar lander is making its descent to Moon Base I. The lander descends slowly under the retro-thrust of its descent engine. The engine is cut off when the lander is 5.0 m above the surface and has a downward speed of 0.80 m/s . With the engine off, the lander is in free fall. The figure shows a lunar lander landing on the Moon. The vertical distance from the lander to the ground is shown to be 5.0 meters.

What is the speed of the lander just before it touches the surface? The acceleration due to gravity on the moon is 1.6/s2.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Vertical Motion and Free Fall concept. You can view video lessons to learn Vertical Motion and Free Fall. Or if you need more Vertical Motion and Free Fall practice, you can also practice Vertical Motion and Free Fall practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Woods' class at USF.