3 years ago

How can Newton's third law describe the forces affecting a rocket as it

1 answer:

5 0

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. In re-action, a thrusting force is produced on the engine mount. The thrust accelerates the rocket as described by Newton's second law of motion.

Explanation:

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Defination coulomb's law.

-BARSIC- [3]

Answer:

a law stating that like charges repel and opposite charges attract, with a force proportional to the product of the charges and inversely proportional to the square of the distance between them.

6 0

3 years ago

A rectangular field is to be enclosed on four sides with a fence. Fencing costs $2 per foot for two opposite sides, and $3 per f

borishaifa [10]

<h2>Dimension for cheap enclose = 32.45 ft x 23.52 ft</h2>

Explanation:

Area of rectangular field, A = 830 ft²

Length = l

Width = w

So we have

l x w = 830

$l=\frac{830}{w}$

Fencing costs $2 per foot for two opposite sides, and $3 per foot for the other two sides.

Cost for fencing, C = 2 x 2 x w + 3 x 2 x l = 4 w + 6 l

$C=4w+6\times \frac{830}{w}$

For minimum cost we have derivative is zero

$dC=4\times dw-6\times \frac{830}{w^2}\times dw\\\\0=4\times dw-6\times \frac{830}{w^2}\times dw\\\\w^2=1245\\\\w=32.45ft\\\\lw=830\\\\l\times 32.45=830\\\\l=23.52ft$