The volume of a cube is given by:
where L is the measure of each side (which corresponds to its width, since all sides of a cube are equal).
Plugging the data of the problem, L=32.1 cm, inside the equation, we find the volume:
Answer:
Average force on the football = 168.82 N
Explanation:
Force = Mass x Acceleration
F = ma
Mass, m = 0.41 kg
We have equation of motion, v = u + at
Initial velocity, u = 0 m/s
Final velocity, v = 21 m/s
Time, t = 0.051 s
Substituting
21 = 0 + a x 0.051
a = 411.76 m/s²
Substituting in force equation,
F = ma = 0.41 x 411.76 = 168.82 N
Average force on the football = 168.82 N
They would hire a street urching and suspend him on a wooden frame.
Then they would charge a glass rod by rubbing it on a cloth and then touch the boy.
Done several times, he would accumulate charge so that bits of papers, leaves and feathers were attracted to him.