While on the moon, the apollo astronauts enjoyed the effects of a gravity much smaller than that on
earth. if neil armstrong jumped up on the moon with an initial speed of 1.51 m/s to a height of
- 0.700 m, what amount of gravitational acceleration did he experience?

1.628

Explanation:

Anywhere in the universe, In a closed system, Conservation of energy is applicable.

In this case

Neil is initially on the surface of moon and has a velocity of 1.51 in upward direction.

⇒He has Kinetic energy= = J

But with respect to the surface of the moon,

where m=mass of moon

           v=velocity of Neil

He has Potential energy= =0 J

At the highest point of his jump, his velocity =0

⇒ Kinetic energy==0 J

His Potential energy with respect to the surface of moon==

where m=mass of moon

           g= gravitational acceleration on moon

           h=height from moon's surface

By Conservation Energy Principle

+=+

+0=0+

=

=  

J=

⇒ g = = 1.628

0.55x745.7j and a calculator