By definition, the mechanical advantage is the relationship that exists between the output force or load lifted and the value of the force applied.
Thus, using the definition, we have that the mechanical advantage is given by:

Therefore, the mechanical advantage of lifting the box by using a pulley is equal to 1.
Answer:
The mechanical advantage in this situation is:
Equal to 1
Go with the last one because you need potential energy for kinetic energy

why momentum is a property of moving objects, but not of stationary objects?
Answer:
Hi, There!-
Momentum is a property of a moving object because velocity is needed to get the momentum. Only a moving object has velocity.
Hope this Helps!

Answer:
0.6m/s²
Explanation:
Given parameters:
Initial velocity = 3m/s
Final velocity = 4.5m/s
Time taken = 2.4s
Unknown:
Average acceleration = ?
Solution:
To solve this problem, we use the expression:
Acceleration =
v is the final velocity
u is the initial velocity
t is the time taken
Acceleration =
= 0.6m/s²
Answer:
Stay the same
Explanation:
The focal length of a lens is determined by its radius and by the indexes of refraction. The distance of the object does not affect the focal length.