Question

If a ball to be used in a club champions league has a mass of 0.5kg and a radius 0.1m, calculate it's volume and weight.[g=10m/s]

Answer 1

weight = mg

= 0.5×10

weight = 5 N

Now

volume of sphere is = 4/3 pi r^3

$\frac{4}{3} \times \pi \times {r}^{3} \\ \frac{4}{3} \times 3.14 \times {(0.1)}^{3} \\ \frac{4}{3} \times 3.14 \times \frac{1}{1000} \\ \frac{4 \times 314 \times 1}{3 \times 1000 \times 100} \\ \frac{1256}{300000} \\ 0.0041 \: {m}^{3} \: answer$