Question

1.найти силу тяжести действующую на 6 м3 дуба2.найти вес 5 м 3 сосны​

Answer 1

Ответ:

Объяснение:

1.

V = 6 м³

ρ = 700 кг/м³

g ≈ 10 H/кг

Fтяж - ?

============

m = ρ·V = 700·6 = 4200 кг

Fтяж = m·g = 4200·10 = 42000 Н = 42 кН

2.

V = 5 м³

ρ = 400 кг/м³

g ≈ 10 H/кг

P - ?

==========

m = ρ·V = 400·5 = 2000 кг

P = m·g = 2000·10 = 20000 H = 20 кН

Answer 2

Finding the force of gravity on a 6 m³ oak tree

To find the force of gravity acting on an object, we can use the formula:

Force of gravity = mass × acceleration due to gravity

The mass of the oak tree can be calculated by multiplying its volume by its density. The density of oak wood can vary, but a commonly used value is around 700 kg/m³.

Let's calculate the mass of the oak tree first:

Mass of oak tree = volume × density

Given: - Volume of the oak tree = 6 m³ - Density of oak wood = 700 kg/m³

Mass of oak tree = 6 m³ × 700 kg/m³ = 4200 kg

Now, we can calculate the force of gravity acting on the oak tree:

Force of gravity = mass × acceleration due to gravity

The acceleration due to gravity on Earth is approximately 9.8 m/s².

Force of gravity = 4200 kg × 9.8 m/s² = 41160 N

Therefore, the force of gravity acting on a 6 m³ oak tree is approximately 41160 Newtons.

Finding the weight of a 5 m³ pine tree

Weight is the force of gravity acting on an object. It is calculated using the formula:

Weight = mass × acceleration due to gravity

To find the weight of the pine tree, we need to calculate its mass first. Similar to the oak tree, we can calculate the mass by multiplying the volume by the density. The density of pine wood can vary, but a commonly used value is around 500 kg/m³.

Let's calculate the mass of the pine tree:

Mass of pine tree = volume × density

Given: - Volume of the pine tree = 5 m³ - Density of pine wood = 500 kg/m³

Mass of pine tree = 5 m³ × 500 kg/m³ = 2500 kg

Now, we can calculate the weight of the pine tree:

Weight = mass × acceleration due to gravity

The acceleration due to gravity on Earth is approximately 9.8 m/s².

Weight = 2500 kg × 9.8 m/s² = 24500 N

Therefore, the weight of a 5 m³ pine tree is approximately 24500 Newtons.

Please note that the values provided for the density of oak and pine wood are approximate and can vary depending on the specific type and condition of the wood.