# How long will you collide?

A ball of mass $$1\textrm{ kg}$$ is dropped from a height $$H=2\textrm{ m}$$. Estimate how long the ball is in contact with the ground (in seconds)?

Details and assumptions

• Simplify the question by modeling the ball as an ideal spring of spring constant $$100 \textrm{ Nm}|$$.
• If necessary, take the gravitational acceleration to be $$9.8\textrm{ m/s}^2$$.
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