Question

if a ball is drop from the height of 100m . During collision with the surface 10% energy is lost.Then calculate the velocity , height and time taken in third collision​

Answer 1

Answer:

We can think it very easily by law of conservation of mechanical energy,

When it has 100% of energy it's total energy was equal to potential energy of it at height of 100cm

So when it has 80% of energy it can reach to a maximum height of 80cm because, at maximum height v=0