Question

The diameter of a lead ball is 2.1 cm. The density of the lead used is 11.34 g/c³. What is the weight of the ball?

Answer 1

Step-by-step explanation:

The weight of the ball will be calculated by using the formula which is

mass= density× volume

now we calculate volume of the lead ball

$= \frac{4}{3} \pi {r}^{3} \\ = \frac{4}{3} \times \frac{22}{7} \times 2.1 \times 2.1 \times 2.1 \\ = 88 \times 4.41 \times \frac{2.1}{21} \\ = 88 \times 4.41 \times .1 \\ = 38.8 \: cc$

now the mass = 38.8 ×11.34

=439.9 g

= .43kg

this is mass now the weight will be equal to

= mg

where m is mass and g is gravitational acceleration

= .43×10

= 4.3 kg