The work performed to elevate the box equals 515.03 J.
Answer:
The buoyant force acting on the block from the water is 10 N
Explanation:
The buoyant force (F_B) experienced by a block is defined as the difference between its actual weight in air and its weight when submerged in water.
The data provided indicates:
A metal block weighs 40 N in air and 30 N in water.
Thus, F_B = 40 - 30 = 10 N
therefore, the buoyant force acting on the block from the water amounts to 10 N
Explanation:
We are given that,
Mass of the rocket, 
(a) The standard unit of mass is kilogram (kg). The conversion between slugs and kilograms is as follows:
1 slug = 14.59 kg
Thus, 
Mass of the rocket, m = 3647500 kg
(b) The weight of the rocket can be expressed as:
W = m g

or

(c) If the rocket were on the moon, the gravitational acceleration on the moon is given as 
Mass refers to the quantity of matter present in an object. Therefore, the mass of the rocket remains constant at 3647500 kg
The weight of the rocket on the moon would be, 

W = 5872475 N
or

Thus, this is the final answer required.