Asked by Emma

A 4.55-kg ball of clay is thrown downward from a height of 3.13 m with a speed of 4.41 m/s onto a spring with k = 1690 N/m. The clay compresses the spring a certain maximum amount before momentarily stopping.

a) Find the maximum compression of the spring.

b) Find the total work done on the clay during the spring's compression.

Answers

Answered by drwls
a) If X is the maximum spring compression,
M g (H+X) + (1/2) M Vo^2 = (1/2)k X^2

M = 4.55 kg, H = 3.13 m, and Vo = 4.41 m/s


Solve for X

b) After solving for X, -(1/2) kX^2 is the work done on the clay by the spring. M g X is done by gravity.
Answered by Emma
i am still not getting the right answer. i think my algebra is wrong. what did you get for an answer?
Answered by drwls
They may be neglecting the X term on the left, but it should be included. Gravity continues to act as the spring is compressed.

Neglecting the X on the left makes the problem easier; otherwise you have a quadratic equation to solve.

I did not compute an answer.
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