Physics

posted by .

a lunar landing module is descending to the moon's surface at a steady velocity of 10 m/s. At a height of 120m, a small object falls from its landing gear. Taking the moon's gravitational acceleration as 1.6m/s^2, at what speed, in m/s, does the object strike the moon?

Conservation of energy:

1/2 v^2 = 1/2 v_{0}^2 + *(1.6m/s^2)*120m

v_{0} = 10 m/s

The answer is suppose to Be 22

Let's see:

1/2 v^2 = 1/2 (10 m/s)^2 + (1.6m/s^2)*120m -->

v^2 = (10 m/s)^2 + 2*(1.6m/s^2)*120m

v = sqrt[100 + 2*1.6*120] m/s=

22 m/s



OOO

i put 10m/s as the final velocity

  • Physics -

    22

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 165 km. How long did it take to go around the Moon once?
  2. Physics helppp

    Imagine a landing craft approaching the surface of the moon of a distant planet. If the engine provides an upward force (thrust) of 2980 N, the craft descends at constant speed; if the engine provides only 2200 N, the craft accelerates …
  3. Physics

    On the earth, you throw an object up in the air at some velocity, v, and it reaches a maximum vertical displacement (max. height if you prefer) of 4.8 meters. If you went to the moon, where the value of the gravitational acceleration …
  4. mastering physics

    A lunar lander is descending toward the moon's surface. Until the lander reaches the surface, its height above the surface of the moon is given by y\left( t \right) = b - ct + dt^2, where b = 740 m is the initial height of the lander …
  5. english

    please organize these notes into a paragraph ;traveled 24,300 mph ;on landing, armstrong's heart rate 156 beats per minute ;lunar module eagle carried armstrong and aldrin to moon's surface ;three astronauts michael collins,neil armstrong, …
  6. Physics

    A 4.51-kg object is thrown vertically upward from the surface of Earth, where the acceleration due to gravity is g1 = 9.81 m/s2. The initial velocity is v1, and the object reaches a maximum height of y1. What is the maximum height, …
  7. Physics

    A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 38.8 m/s. At the same time, it has a horizontal velocity of 54.3 m/s.At what speed does the vehicle move along its descent path
  8. physics

    A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 34.1 m/s. At the same time, it has a horizontal velocity of 53.5 m/s. At what speed does the vehicle move along its descent path?
  9. physics

    During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 113 km. How long did it take to go around the Moon once?
  10. physics

    a 2.00 * 10^5 kg lunar landing craft is about to touch down on the surface of the moon

More Similar Questions