The work done by Joe is 0 J.
<u>Explanation</u>:
When a force is applied to an object, there will be a movement because of the applied force to a certain distance. This transfer of energy when a force is applied to an object that tends to move the object is known as work done.
The energy is transferred from one state to another and the stored energy is equal to the work done.
W = F . D
where F represents the force in newton,
D represents the distance or displacement of an object.
Force = 0 N, D = 20 cm = 0.20 m
W = 0 0.20 = 0 J.
Hence the work done by Joe is 0 J.
Answer:
The gravitational acceleration experienced was of 1.63m/s².
Explanation:
We know, from the kinematics equations of vertical motion that:
Solving for g, we get:
Since the final speed is zero, because Neil Armstrong came to a stop in his maximum height, we obtain:
Finally, we plug in the given values of the initial speed and the maximum height:
This means that the gravitational acceleration experienced by Neil Armstrong in the moon, was of 1.63m/s².