What is the density of a substance of volume 3 m3and mass 9 kg?
1 answer:
Answer:
Density = 3 kg/m³
Explanation:
Given the following data;
Volume = 3m³
Mass = 9 kg
To find the density;
Density can be defined as mass all over the volume of an object.
Simply stated, density is mass per unit volume of an object.
Mathematically, density is given by the formula;
Substituting into the formula, we have;
Density = 3 kg/m³
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Spring constant, k = 784 N/m
Distance = 49 cm
<u>Explanation:</u>
Given:
Mass, m₁ = 3 kg
Distance, x₁ = 30 cm
Distance, x₂ = 45 cm
Spring constant, k = ?
(a)
When the mass is being stretched at a height then potential energy gets converted to kinetic energy.
Potential energy = kinetic energy
On substituting the value, we get:
(b)
Total mass, m = 3 kg + 2kg
= 5 kg
Distance, x = ?
We know:
Force = mg
Force on a spring = kx
The spring stretches to 0.494m or 49 cm when a weight of 2kg is added