PHYSICS!! need help with physics equation

Physics
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You're squeezing a springy rubber ball in your hand. If you push inward on it with a force of 1 N, it dents inward  2 mm. How far must you dent it before it pushes outward with a force of 4 N? 

Apr 9th, 2015

we know that , F = kx

where k = spring constant (which is constant for a particular spring )

 1 N force  dent = 2 mm therefore    k = F/x = 1/2 N/mm , or k = 0.5 N/mm

Now F = 4 N hence

F = k x 

4 = 0.5 * x

therefore x =4/0.5 = 8 mm    (Answer)

Hence ball will 8 mm Dent inside

Apr 9th, 2015

Thank you so much Saroj!

Apr 9th, 2015

you are most welcome

Apr 9th, 2015

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