1. Height of cube =9cm
mass of cube= 3645 g
volume= length ×breadth× height
as cubic volume so length breadth and heights are same so
volume =height ×height ×height
V =9cm×9cm×9cm= 729cm³
density =mass/ volume
density =3645g/729cm³
density= 5g/cm³
2. AS DENSITY = mass/volume
volume =mass/ desity
volume= 13.558g/(0.089g/l)
volume= 0.152L³
Answer: type of force is friction
Explanation:
Question: Find acceleration of a refrigerator 30s after a person begins pushing it at a force of 400 N, If the mass of the refrigerator is 10 kg.
Answer:
40 m/s²
Explanation:
Applying,
F = ma................Equation 1
Where F = Force applied to the refrigerator, m = mass of the refrigerator, a = acceleration of the refrigerator.
make a the subject of the equation
a = F/m............ Equation 2
From the question,
Given: F = 400 N, m = 10 kg
Substitute these values into equation 2
a = 400/10
a = 40 m/s²