Apole vaulter takes 1.3 seconds to fall from peak height to the landing mat. what is his vertical velocity at contact with the mat?

Assuming vertical acceleration of , the speed after x seconds of falling is

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg