Question

Найдите силу тяжести, действующую на сосновый брусок объемом 4 дм3 ( плотность сосны 400 кг/м3

Answer 1

V=4 дм³=0,004 м³          1)  находим массу: m=ρV;
ρ=400 кг/м³                         m=400*0,004=1,6 кг;
g=10 Н/кг                       2) находим силу тяжести:
_____________                  F=mg;
F-?                                       F=1,6*10=16 H
                                Ответ: F=16 H.

Answer 2

Calculation of the Force of Gravity on a Pine Block

To calculate the force of gravity acting on a pine block with a volume of 4 dm³ and a density of 400 kg/m³, we can use the formula:

F = m * g

Where: - F is the force of gravity - m is the mass of the pine block - g is the acceleration due to gravity

To find the mass of the pine block, we can use the formula:

m = density * volume

Substituting the given values, we have:

m = 400 kg/m³ * 4 dm³

To convert the volume from dm³ to m³, we need to multiply by 0.001:

m = 400 kg/m³ * 4 dm³ * 0.001 m³/dm³

Simplifying the expression, we get:

m = 1.6 kg

Now that we have the mass of the pine block, we can calculate the force of gravity by multiplying the mass by the acceleration due to gravity. The acceleration due to gravity is approximately 9.8 m/s².

F = 1.6 kg * 9.8 m/s²

Calculating the product, we find:

F ≈ 15.68 N

Therefore, the force of gravity acting on the pine block is approximately 15.68 Newtons.