Ameteorite has a speed of 80.0 m/s when 900 km above the earth. it is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.20 m .

Part a)

Part b)

Part c)

Part d)

Explanation:

Part a)

As we know that total mechanical energy of the meteorite must be conserved

so we will have

Part b)

Work done by sand to stop it

Part c)

As we know that

W = F. d

so we have

Part d)

Work done = thermal energy

less than one you can't create energy

measuring things 1 litre of water